Question

What is the slope of the line that passes through (2, 1) and (2, -9)?

explain on how you got the answer

Answer 1

Answer: the slope is undefined

Explanation:

Slope = y2-y1 divided by x2-x1

slope = -9 - 1 divided by 2 - 2

slope = -10 divided by 0

Any slope with 0 as the denominator is always undefined.

Answer 2

Hi!

slope of a line passing through the point (2,1) and (2,-1)

as you can see the abscisas of the point is same which means x-axis

now by formula

m = slope y2-y1/x2-x1

-9-1/2-2

-10/0 when there's zero in denominator this mean answer is infinity ♾️

This mean line is parallel to Y-axis

so when we're hanging out