Chapter 8 - Graphing Quadratic Functions - 8.5 - Using Intercept Form - Exercises - Page 455: 36

Graph $E$

Given the function: $$y=(x+3)(x-3)$$ Rewrite it in the form $y=a(x-p)(x-q)$: $$y=(x-(-3))(x-3)$$ It follows that the $x$-intercepts are $-3$ and $3$. The graph which intersects the $x$-axis at $x=-3$ and $x=3$ is graph $E$.