Question

What is the slope between the two points that we know (4,9) and (6,1)?

Answer 1

slope = - 4

To calculate the slope m use the gradient formula

m = ( y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (4, 9 ) and (x₂, y₂ ) = (6, 1 )

m = $\frac{1-9}{6-4}$ = $\frac{-8}{2}$ = - 4