Line AB contains points A (-1, 3) and B (5, 3). Line AB has a slope that is

Answer 1

A. Zero
B. Undefined
C. Positive
D. Negative

Answer 2

is it "D"?

Answer 3

Since both have y=3, the slope is zero

Answer 4

But how about the -1?

Answer 5

what about it?
If both points have the same y-coordinate, the line is horizontal. Does not matter what the x-coordinate is.

ALL points on the horizontal line y=3 are of the form (x,3) no matter what x is.

Answer 6

THANK YOU!!