Question

What is the range of the graph of y = –2(x – 3)^2 + 7?

Answer 1

max{y = -2 (x-3)^2+7} = 7 at x = 3

Answer 2

y≥7
y≥2
y≤7
y≤2

Answer 3

maximum of y occurs at x = 3 where y = 7

minimum is -inf

so range is (-inf, 7]

Answer 4

or
y <= 7 is range