Posted by Anonymous on .
Find two quadratic functions whose graph have given xintercepts. Find one function whose graph opens upward and another whose graph opens downward.
(4,0) (0,0)

MATH 
Steve,
from the values of the roots, we know that the functions will be of the form
y = ax(x+4)
So, pick a positive to open upward, and a negative to open downward.
Any nonzero value will do.