which describes the effect of the transformations on the graph of ƒ(x) = x2 when changed to ƒ(x) =
1
4
(x − 3)2 − 9?
a) stretched vertically, shifted left 3 units, and shifted up 9 units
b) stretched vertically, shifted right 3 units, and shifted down 9 units
c) compressed vertically, shifted left 3 units, and shifted up 9 units
d) compressed vertically, shifted right 3 units, and shifted down 9 units