Which of the following is the equation of a line perpendicular to the line , passing through the point (3,9)?

a. 2x - 3y = 21
b. -2x +3y = 21
c. -2x - 3y = -21
d. 2x +3y = 21

For this case, we have that by definition, if two lines are perpendicular, it follows that:

If we have the line:

With slope

A line perpendicular to this would have slope:

Thus, the equation of this line is given by:

Substituting the pointwe find the cut point "b":

Thus, the equation is:

Multiplying by "3" on both sides of the equation:

Option B

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0