Slope intercept

Question

Write the slope intercept form of possible of the equation of the line perpendicular to the line x=1 and containing the point (-3,-9)

Answer 1

The perpendicular line will have slope -1.

 

y = Mx + B

 

Plugging in M = -1, y=-9 and x = -3:

 

 -9 = (-1)(-3) + B

 

-9 = 3 + b

 

B = -12

 

The equation is y = -X + -12