What is the slope of the line x = 4?
回答 (5)
2016-07-07 1:31 am
✔ 最佳答案
x = 4 has undefined slope because it's a vertical line. 
2016-07-07 1:50 am
undefined
2016-07-07 1:37 am
Vertical line
2016-07-07 7:08 am
A line with x = 4 can be expressed as y = mx + c , that is : y = 4m + c , so slope m = y / 4 , but with x = 4 the said line is parallel to y axis and it is at a distance from yy' axis at a distance of 4 , so a line parallel to yy' axis is a perpendicular line to xx' axis so it has no slope.
2016-07-07 1:27 am
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160706172723AAeHLdx