Select the pair of lines below that are perpendicular.

Responses
a. y= -2/3 x -7 and y= -3/2x + 1/7
b. y= -3/2 x -3 and y= -2/3 x+ 1
c. y= 2/3 x +4 and y= -2/3 x + 4
d. y= 3/2 x +4 and y= -2/3 x + 5

c. y= 2/3 x +4 and y= -2/3 x + 4