Question

of linear canation
Alhich have
straight line
Sarah
2020
horizontal
vertical
ti
perpendicular
these​

Answer 1

Explanation:

Problem 1. What number is the slope of each line?

To see the answer, pass your mouse over the colored area.

To cover the answer again, click "Refresh" ("Reload").

Do the problem yourself first!

a) The slope of a line b) The slope of a line

3

4 4

3

c) The slope of a line d) The slope of a line

− 4

3 − 3

4

Horizontal and vertical lines

What number is the slope of a horizontal line -- that is, a line parallel to the x-axis? And what is the slope of a vertical line?

The slope of a line

A horizontal line has slope 0 because even though the value of x changes, the value of y does not. Δy = 0.

Δy

Δx = 0

Δx = 0. (Lesson 5)

For a vertical line, however, the slope is not defined. The slope tells how the y-coördinate changes when the x-coördinate changes. But the x-coördinate does not change -- Δx = 0. A vertical line does not have a slope.

Δy

Δx = Δy

0 = No value.