Question

find the value of r so that the line that passes through each pair of points has the given slope.
(8,-2), (r,-6), m=-4

Answer 1

simply use the formula to find the slope

Answer 2

thus given
(-6 - (-2) )/(r-8 )= -4
-4/(r-8) = -4
or r-8=1
or r=1+8=9

Answer 3

I see thanks!