Answer:
r= -7
Step-by-step explanation:
[tex]\boxed{slope = \frac{y1 - y2}{x1 - x2} }[/tex]
Given that the slope is 2,
[tex] \frac{r - 11}{ - 4 - 5} = 2[/tex]
[tex] \frac{r - 11}{ - 9} = 2[/tex]
Multiply both sides by -9:
r -11= 2(-9)
r -11= -18
Add 11 on both sides:
r= 11 -18
r= -7
