Which table gives three values of x and their corresponding values of y for the equation 21x−32y=4?
x=2, y=-15/4; x=4, y=-9/2; x=6, y=-21/4
x=2, y=-9/2; x=4, y=-15/4; x=6, y=-3
x=2, y=-9/2; x=4, y=-3; x=6, y=-3/2
x=2, y=-15/4; x=4, y=-3; x=6, y=-9/2