Question

Find the slope of a line through the points (-5, 2) and (-5, 4).

Select the best answer from the choices provided.
A.
1/5
B
-1/5
C 0
D.
undefined

Answer 1

D

Explanation:

Slope = (y2-y1)/(x2-x1)

= (4-2)/(-5-(-5))

= 2/0

Which is undefined

Alternately,

Since both points have x-coordinate of -5, they lie on the line x = -5

which is a vertical line (parallel to y-axis).

Every vertical line has an undefined slope

Answer 2

The slope is undefined, because the x values are the same.