Question

Slope of (3, -9) (3, 18)

Answer 1

Undefined.

Explanation:

To calculate the slope between two points on a graph, we use
`(y2-y1)/(x2-x1)`.

Once we substitute in the provided points, this becomes
`(18-(-9))/(3-3)`.

Simplify to
`(27)/(0)`.

This does not give us a number and instead results in an undefined slope, aka a vertical line.