Question

What is the slope of the line that contains the point (3, 9) and (3, 4)?

A) 6/5
B) 6/13
C) Zero
D) Undefined

Answer 1

D) Undefined slope

Explanation:

Note that the x-coordinate (3) of both given points is 3. This means that the two points lie on a vertical line. The slope of a vertical line is undefined.

The correct answer is D) Undefined slope