Question

A(1,-1), B(-4, 8) find the slope

Answer 1

slope m = -
`(9)/(5)`

Explanation:

calculate the slope m , using the slope formula

m =
`(y_(2)-y_(1) )/(x_(2)-x_(1) )`

let (x₁, y₁ ) = A (1, - 1 ) and (x₂, y₂ ) = B (- 4, 8 )

substitute these values into the formula for m

m =
`(8-(-1))/(-4-1)` =
`(8+1)/(-5)` =
`(9)/(-5)` = -
`(9)/(5)`