Select the correct answer.

Question

Which two points have an undefined slope?

A.
(-1,1) and (1,-1)
B.
(-2,2) and (2,2)
C.
(-3,-3) and (-3,3)
D.
(-4,-4) and (4,4)

Answer 1

The slope of a line is undefined when the two points have the same x-coordinate, indicating a vertical line.

Let's analyze the options:

A. (-1,1) and (1,-1) - Different x-coordinates. B. (-2,2) and (2,2) - Different x-coordinates. C. (-3,-3) and (-3,3) - Same x-coordinates (undefined slope). D. (-4,-4) and (4,4) - Different x-coordinates.

The correct answer is C. (-3,-3) and (-3,3), as these points have an undefined slope.