Answer:
x=3
Step-by-step explanation:
The equation is [tex]y=mx+b[/tex] (Slope-Intercept Form)
m is the slope.
[tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
[tex]m=\frac{-9-3}{3-3} =\frac{-12}{0} \\m=\infty[/tex]
The final equation is x=3 because both x-coordinates are 3
