What is an equation of the line that passes through the point (−2,5) and is perpendicular to the line whose equation is y = ½ x + 5?

A. Y=2x+1
B. Y=-2x+1
C. Y=2X+9
D. -2X-9

Question

What is an equation of the line that passes through the point (−2,5) and is perpendicular to the line whose equation is y = ½ x + 5?

A. Y=2x+1
B. Y=-2x+1
C. Y=2X+9
D. -2X-9

tkhunny · Answer

Point is given: (-2,5)

Slope is Given: Perpendicular to 1/2 is -2.  Do you know why?

Ponit-Slope form solve the problem.

anonymous · Answer

I can't figure it out. I tried point slope and came up with y=1/2x+4...

tkhunny · Answer

You cannot get "½".  That woudl be parallel.

(y-5) = -2(x+2)

Now what do you get?

anonymous · Answer

Y=-2x+1?

tkhunny · Answer

Watch those horrible words very carefully.  Perpendicular / Parallel.  Not hte same.  Promise?

anonymous · Answer

Haha promise. Is that the correct answer?

tkhunny · Answer

Got it.  Get the next on on the first try, now that you are the master rememberer of wonderful p-words.

anonymous · Answer

Hahaha, thanks for the help. :)