A software designer is mapping the streets for a new racing game. All of the
streets are depicted as either perpendicular or parallel lines. The equation of
the lane passing through A and B is-7x+3y=-21.5. What is the equation of
the central street PQ?
OA. -3x+4y= 3
OB. 3x + 7y=63
OC. 2x+y=20
OD. 7x+3y= 70