首页
登录
职称英语
Line k lies in the xy-plane. The x-intercept of line k is -4, and line k passes
Line k lies in the xy-plane. The x-intercept of line k is -4, and line k passes
游客
2024-01-12
28
管理
问题
Line k lies in the xy-plane. The x-intercept of line k is -4, and line k passes through the midpoint of the line segment whose endpoints are(2, 9)and(2,0). What is the slope of line k ?
Give your answer as a fraction.
选项
答案
3/4
解析
You can calculate the slope of a line if you know the coordinates of two points on the line. In this question you are given information about two points on line k, namely,
the point at which line k crosses the x-axis has x-coordinate -4;
the midpoint of the line segment with endpoints at(2, 9)and(2,0)is on line k.
The coordinates of the first point are(-4, 0), since the x-coordinate is -4 and the y-coordinate of every point on the x-axis is 0. For the second point, the midpoint of the line segment is halfway between the endpoints(2, 9)and(2, 0).
Thus, the midpoint has x-coordinate 2 and y-coordinate 9/2, the number halfway between 9 and 0. Based on the coordinates(-4, 0)and(2,9/2), the slope of line k is
The correct answer is -(or any equivalent fraction).
转载请注明原文地址:https://tihaiku.com/zcyy/3355857.html
相关试题推荐
Intherectangularcoordinatesystem,linekpassesthroughthepoint(n,-l).Is
Inarectangularcoordinatesystem,linekhasx-intercept4andslope-2.Colum
Intherectangularcoordinatesystem,linekpassesthroughthepoints(0,0)an
Linekliesinthexy-plane.Thex-interceptoflinekis-4,andlinekpasses
有一条直线y=mx+b,x-intercept=-2,y-intercept=3,求直线的斜率。根据上面的公式我们可以直接写出方程x/-2+y/3=1。所以
UnlikesomeclassicEuropeannovels,Americanliteratureencompassesmanydiffer
UnlikesomeclassicEuropeannovels,Americanliteratureencompassesmanydiffer
UnlikesomeclassicEuropeannovels,Americanliteratureencompassesmanydiffer
UnlikesomeclassicEuropeannovels,Americanliteratureencompassesmanydiffer
随机试题
Therearevariouswaysinwhichindividualeconomicunitscaninteractwith
[originaltext](I):So,ifyousaythere’sacrisis,thenwhatdowedo?Now,yo
【B1】[br]【B9】[originaltext]Italiansareknownforthemandtheoriessugges
Whileanti-slaverysentimenteventuallydictatedpolicyinboththeUnitedS
Iamaveryluckygirlandmyfamilyisthenicestintheworld.Mummyand
It’sreportedthatbytheendofthisye
卫气行于()。A.肾中B.脉内C.脉外D.膻中E.以上均不是
湿阻中焦、脘腹胀满首选A.枳壳B.枳实C.山楂D.厚朴E.砂仁
关于贮存药物的叙述正确的是A.某些止咳药水遇冷可变黏稠,所以需要冷藏保存 B.
假设我国某商业银行是一家系统重要性银行,2015年年末,该银行的部分业务及监管指
最新回复
(
0
)