Question

Find the slope of line passing through the points (5,9) and (5,-2)

Answer 1

`\sf~m=(y_2-y_1)/(x_2-x_1)`

(5, 9), (5, -2)
x1 y1 x2 y2

Plug in what we know:


`\sf~m=(-2-9)/(5-5)`

Subtract:


`\sf~m=(-11)/(0)`

We can't divide by zero, so:


`\sf~m=\boxed{\sf~Unde~\!\!\!\!~fined}`