Question

-16x^2 +160x -256 .

a. does the graph open upward or downward?
b.what are the y intercepts?
c. x intercepts?
d.range?

Answer 1

for a.
try a large value for x, the x^2 term is the most significant when x is large or large negative, checking the sign of the coefficient term of x^2 should reveal the way the graph is curving as you move along the x axis