Question

What is the range of the function y = -x2 + 1?
y ≤ -1
y ≥ -1
y ≤ 1
y ≥ 1
and why

Answer 1

do you know which way this parabola opens?

Answer 2

y ≤ 1
becouse x2 is always positive. So - x2 will be always negative. Basicly you are substracting numbers from 1. This means that the maximum value will be when you substract nothing, x2 =0 and for anything else will be less than that

Answer 3

this is graph for this function