Answer
a. $x=-1$, even multiplicity, $x=4$, even multiplicity,
b. $y=-(x+1)^2(x-4)^2$
c. $y=-16$
Work Step by Step
a. zeros: $x=-1$, even multiplicity, $x=4$, even multiplicity,
b. We can write the equation as $y=-(x+1)^2(x-4)^2$
c. The y-intercept can be found as $y=-16$ from the above equation by letting $x=0$, or by reading from the given graph.
