Answer:
See attached picture and description for function
Step-by-step explanation:
Assuming this is the function [tex]f(x)=0.25(x+4)(x-8)[/tex], begin by plotting the roots or zeros of the function.
x+4 = 0 so x=-4.
x-8=0 so x=8.
Plot these two values on the x axis. Since the leading coefficient is positive then the graph looks like a U.