Answer:
slope = 0
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 ) = (- 9, - 3 ) and (x₂, y₂ ) = (1, - 3 )
m = [tex]\frac{-3-(-3)}{1-(-9)}[/tex] = [tex]\frac{-3+3}{1+9}[/tex] = [tex]\frac{0}{10}[/tex] = 0
