Which of the following is the equation of a line perpendicular to the line y=-3/2 x+4, passing through the point (3,9)?

-2x-3y=-21

2x-3y=21

2x+3y=21

-2x+3y=21

Question

Which of the following is the equation of a line perpendicular to the line y=-3/2 x+4, passing through the point (3,9)?

-2x-3y=-21

2x-3y=21

2x+3y=21

-2x+3y=21

freckles · Answer

can you identify the slope of the line y=-3/2 x+4 ?

freckles · Answer

well the slope of y=mx+b is m
so your slope is...?

freckles · Answer

Once you identify the slope of y=-3/2 x+4
we can find the slope of the perpendicular line

For my line y=mx+b, a perpendicular line to that could be given by y=-1/m x+c .
You find what c needs to be by entering in your point in which this line should go through .

freckles · Answer

I'm going to take off now. 
Sleep time.

anonymous · Answer

Find the slope of this line. The slope of your perpendicular will be the negative reciprocal of this.