Answer
A) $(4,5)$
B $(x<4)$
C $x>4$
D $(-1,0),\ (9,0)$
E $(0,9)$
Work Step by Step
A) The graph shows that when $x=4$, $y= 25$. The vertex of the function is at $(4, 25)$.
B) The function is increasing for $x< 4$.
C)The function is decreasing for $x> 4$.
D The graph crosses the $x$-axis at the horizontal intercepts $(-1,0)$ and $(9,0)$.
E) When $x= 0$, $y= 9$. The vertical intercept is at $(0,9)$.
