Question

Determine whether the parabola y = −x2 + 15x + 8 opens up, down, left, or right.

Answer 1

if the x is squared, this is an up/down type
if the y is squared, this is a left/right type

the coefficien of the x^2 term (quadratic term) will tell you... if it's negative then it opens downwards, if positive then upwards.

Answer 2

thxxxxx