slope m = - [tex]\frac{1}{3}[/tex]
to calculate m use the gradient formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (- 7, - 3 ) and (x₂, y₂ ) = (8, - 8 ) ← 2 points on the line
m = [tex]\frac{-8+3}{8+7}[/tex] = [tex]\frac{-5}{15}[/tex] = - [tex]\frac{1}{3}[/tex]
