Question

Find the slope of the line through the pair of points a (2,-3) p(2,9)

Answer 1

(x₁,y₁) = (2,-3)
(x₂,y₂) = (2,9)

To determine the slope using two points lie on the line, we could use the following formula
m =
`(y_(2)-y_(1))/(x_(2)-x_(1))`

plug in the numbers
m =
`(9-(-3))/(2-2)`
m =
`(9+3)/(0)`
m =
`(12)/(0)`
m = undefined

The slope is undefined, the line is vertical