Quadratic functions q and w are graphed on the same coordinate grid. The vertex of the graph of q is 18 units below the vertex of the graph of w. Which pair of functions could have been used to create the graphs of q and w?


A. q(x)=18[tex]x^{2}[/tex] and w(x)=[tex]x^{2}[/tex]


B. q(x)=[tex]x^{2}[/tex] +18 and w(x)=[tex]x^{2}[/tex]


C. q(x)=-18[tex]x^{2}[/tex] and w(x)=[tex]x^{2}[/tex]


D. q(x)=[tex]x^{2}[/tex]-18 and w(x)=[tex]x^{2}[/tex]


Thank you in advance for any help!