Quadratic functions q and z aré graphed on the same coordinate grid. The vertex
of the graph of q is 7 units below the
vertex of the graph of z. Which pair of
functions could have been used to create
the graphs of q and z?
A 9(x) = 7x2 and z(x) = x?
B 9(x) = x? - 7 and z(x) = x2
C 90x) = x² + 7 and z(x) = x2
D 9(x) = -7x' and z(x) = x?