1 . 如图,在菱形
中,
.点P,Q分别以每秒2个单位长度的速度同时从点A出发,点P沿折线
方向匀速运动,点Q沿折线
方向匀速运动,当两者相遇时停止运动.设运动时间为x秒,点P,Q的距离为y.
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出当
时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8753d251643604a827caff35e946b613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3087da5c11909dab613378fee8d471fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61f3666f73b23408ceaff1502fe02fd.png)
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2卷引用:重庆市大学城第三中学校2023-2024学年八年级下学期期中考试数学试题
2 . 某数学兴趣小组,对函数
的图象和性质进行了探究,探究过程如下:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/b167311f-f018-48e5-afed-c33c423f908d.png?resizew=222)
(1)自变量x的取值范围是全体实数,x与y的几组对应值如表:其中m= .
(2)如图,在平面直角坐标系
中,描出了上表中各对对应值为坐标的点,根据描出的点,画出该函数的图象:
(3)写出一条函数图象的性质
(4)当
时,x的取值范围为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a39a8560abd8040b7543ed813c0649.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/b167311f-f018-48e5-afed-c33c423f908d.png?resizew=222)
x | … | 0 | 1 | 2 | 3 | 4 | 5 | … | |||
y | … | 5 | 4 | m | 2 | 1 | 2 | 3 | 4 | 5 | … |
(1)自变量x的取值范围是全体实数,x与y的几组对应值如表:其中m= .
(2)如图,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(3)写出一条函数图象的性质
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f92e4e352a96ec6dfaf1fc4a13f5c63.png)
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3 . 如图,在
中,
,
,
,M为
中点,动点P以每秒1个单位长度的速度从点M出发,沿折线
方向运动,设运动时间为t秒,
的面积为s.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/9d0cf336-db10-4102-a2eb-6260a320e2c3.png?resizew=196)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/eec8f874-ab20-402d-b9e2-0258b98f5f67.png?resizew=235)
(1)求出s关于t的函数表达式,并注明自变量t的取值范围;
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)当
时,直接写出 t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefb5c753240365bcd8aebb64ffcbc56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/9d0cf336-db10-4102-a2eb-6260a320e2c3.png?resizew=196)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/eec8f874-ab20-402d-b9e2-0258b98f5f67.png?resizew=235)
(1)求出s关于t的函数表达式,并注明自变量t的取值范围;
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6fc708b8db221c6a80705a5ce9d556.png)
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2卷引用: 重庆市第一中学校2023-2024学年八年级上学期期中数学试题
名校
4 . 如图,四边形
中,
.点
从
出发,沿着折线
运动,到达点
停止运动.设点
运动速度为2,时间为
,连接
,记
的面积为
,请解答下列问题:
关于
的函数关系式,并写出自变量
的取值范围;
(2)在平面直角坐标系中,画出该函数的图象,并写出该函数的一条性质;
(3)结合图象,当
的面积不大于四边形
面积的
时,直接写出
的取值范围.(结果保留一位小数,误差不超过
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a0a6e04dcd0e950b575689af4f2444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d5a916fb3c6134235eca1824df0f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5d0162d0ee5286bf0f1996d7180382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在平面直角坐标系中,画出该函数的图象,并写出该函数的一条性质;
(3)结合图象,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5d0162d0ee5286bf0f1996d7180382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
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3卷引用:重庆西西南大学附属中学校2023-2024学年八年级下学期数学试题4
23-24八年级上·安徽合肥·期中
名校
5 . 下列表示的图象,y是x的函数的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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5卷引用:重庆市大渡口区巴渝学校2023-2024学年八年级上学期期中学业评价数学试题
重庆市大渡口区巴渝学校2023-2024学年八年级上学期期中学业评价数学试题 重庆市长寿中学校2023-2024学年八年级下学期4月期中考试数学试题(已下线)安徽省合肥市2023-2024学年八年级上学期期中模拟数学试题安徽省合肥市部分学校联考2023-2024学年八年级上学期期中数学试题陕西省西安市五环中学2023-2024学年八年级上学期期中数学试题
名校
6 . 如图,
中,
,
,
.点P从点B出发,沿折线
运动,当它到达点A时停止运动,设点P在运动过程中,其运动的路程为
,
的面积为y(y可以取0).
(1)直接写出y关于x的函数关系式,并注明
的取值范围;
(2)在给定的平面直角坐标系中,画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,若
,直接写出
时的
取值范围.(结果保留1位小数,误差不超
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7012d1ff11db5e150182e19646814cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/e7cbaedd-18e3-4694-9bdc-6c5d804187c1.png?resizew=445)
(1)直接写出y关于x的函数关系式,并注明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在给定的平面直角坐标系中,画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471ebac67b6a4c296ba7263eb79c57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ad78c5c2e3aeb1c03a097681c6ca31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
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7 . 为了解脱贫攻坚成果,宣传乡村振兴发展之路,某电视台记者乘汽车赴
批外的新农村进行采访,路程的第一部分为高速公路,第二部分为省道,第三部分为乡道.若汽车在高速公路、省道、乡道上分别以某一速度匀速行驶,汽车行驶的路程y(单位:
)与时间x (单位:
)之间的关系如图所示,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2057bad2d3a514b3095cdd79bc6514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933311c0c090e1138e4dd388b7adf8a.png)
A.汽车在高速公路上的行驶速度为![]() |
B.省道总长为![]() ![]() |
C.该记者在出发![]() |
D.汽车在省道上的行驶速度为![]() |
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2卷引用:重庆市第八中学校2023-2024学年八年级上学期期中数学试题
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8 . 描点画图是探究未知函数图象变化规律的一个重要方法,下面是通过描点画图感知函数
图象的变化规律的过程:
(1)化简函数解析式,当
时,
,
时,
;
(2)根据表中的数据,完成如表,并画出该函数的图象:
(3)若另一个一次函数
过点
,且与
的图象有交点,则k的范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0bc3f01b44ad399c491df024d26f17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/d8c4d16c-1015-406f-a098-9440045b2204.png?resizew=230)
(1)化简函数解析式,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d81ec4fd4fc5bc7e57d19cf1975aea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4730c308c770a8009e0be035141c00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18107cb897c7fcaa8599c7eef7ceb6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4730c308c770a8009e0be035141c00a.png)
(2)根据表中的数据,完成如表,并画出该函数的图象:
x | … | ![]() | 0 | 1 | … |
y | … | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1d367631c7ba864cfbf5d2c728ceb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24db5b336da6b344110527141f8ccec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0bc3f01b44ad399c491df024d26f17.png)
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9 . 如图,在等腰中,
于点D,
,
.动点E,F同时从点C出发,点E以每秒1个单位的速度沿线段
运动.点F以每秒
个单位的速度沿折线
运动.当点E到达点B时,E、F两点同时停止运动.设点E的运动时间为t秒,
的面积记为
,
的长度记为
.
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(2)如图2,平面直角坐标系中已给出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)结合函数图象,估计当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
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4卷引用:重庆市第一中学2023-2024学年八年级下学期数学周测消化训练习题二
名校
10 . 如图1,在
中,
,
,直线
经过点
且与边
相交,动点
从点
出发沿
路径向终点
运动,同时,动点
从点
出发沿
路径运动,当动点
与动点
相遇后,经过1秒,动点
立马掉头并保持原速追动点
,当
,
两点均运动到
点时,运动结束.运动过程中动点
,
在折线
上的距离为
,运动时间为
(秒).变量
与
之间的关系如图2所示,请回答以下问题:
(1)
_______
,
_______,
的运动速度为_______
;
(2)当点
,
均在
边上时,求
的面积
与运动时间
(秒)的关系式;
(3)若在运动过程中,分别过点
和点
作
于点
,
于点
,当
和
全等时,直接写出
的值(
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2410ff5236b24ff24f2cb54c8e733f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1da0304251a6a0966cd5238660dfa9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f153ca324c9fd5fd0247b1f6e9fa53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a8e2712494bc2022c30d37e395cf10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/c756fec4-ea63-4a03-8b4a-542ffeca2fda.png?resizew=398)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1dce4a03cf2c9a68b2399d4339a035.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab9091bc1886a3fd3d17160b2d41ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若在运动过程中,分别过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720a9d0830aaa9d7ebb8af173e9da83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a320accba1baa44d2d8a5a3c34307f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66aac85b3ff48c1516ff40362004cdbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fb4c7a4bf45e467b2d90f6325056c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0963df6134c38a6edb0331de4db07e.png)
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