Answer:
slope = 4
Step-by-step explanation:
Calculate the slope m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 1, - 7 ) and (x₂, y₂ ) = (3, 9 )
m = [tex]\frac{9-(-7)}{3-(-1)}[/tex] = [tex]\frac{9+7}{3+1}[/tex] = [tex]\frac{16}{4}[/tex] = 4
