Find the slope if it exists, of the line containing the pair (3,4) and (3,-7)

The slope formula is y1-y2/x1-x2.

First thing you have to find which cordinates will be y1 and x1. Then which cordinates will y2 and X2

I will do it so (3,4) = (x1, y1) and (3,-7) = (x2, y2)

Now plug the numbers into the formula and get:

(4--7) / (3-3)

4--7=4+7=11

3-3=0

Now you have 11/0 for slope. If a slope has a 0 in the denominator it is undefined. So this slope is undefined.