Tell whether each statement about a function of the form f(x) = ax2 is always true, sometimes true, or never true.
a. The graph is a parabola that opens upward.
b. The vertex of the graph is (0,0).
c. The axis of symmetry of the graph is x=0.
a. The statement "the graph is a parabola that opens upward" is
about a function of the form f(x)= ax