Which pair of equations are perpendicular lines? a. 5x + 2y = 9 and y = –5/2x+27/2 b. x – 3y = 11 and y = –3x + 23 c. 4x + 2y = 6 and y = –2x + 18 d. x – 3y = 5 and y = 3x – 1

There is a really easy way to do this problem and that is to use a graphing website

after punching in the functions:

A. depending of whether it is -5/(2x) or (-5/2)x: intersecting but not perpendicular or parallel
B. These two lines are perpendicular
C. Parallel lines
D. intersecting but not perpendicular

Sometimes life is like a tunnel. you can’t always see the light at the end of the tunnel, but if you keep moving, you will come to a better place