Question

Find the slope of the line joining each pair of points. Then draw the line in a coordinate plane:

I(5, 2), J(5, −4)

I know this should be infinity or no solutions, but my homework site is marking both answers as wrong. I don't know what else it can be.

Answer 1

Explanation:

Here slope = (y2-y1)/(x2-x1)

Which comes out to be: (-4-2)/5-5 = -6/0 !!!

But we cannot divide by 0. So the slope is undefined. This is basically a vertical line. The "slope" of a vertical line. A vertical line has undefined slope because all points on the line have the same x-coordinate.

If your hw website is not accepting undefined as answer then what are the options that it provides?