SAT Math Question? (from May 2012 SAT)

aigooo
Tue, 10 Jul 2012 14:12:54 +0000

Hi,

This is my first time posting on this forum. I hope I’m posting in the right place! I sometimes come here to find answer explanations to SAT problems that I don’t understand~ (so helpful!) I’m currently reviewing some of the math problems I got wrong on the May 2012 SAT’s, and I’m stumped on one question. Help would be highly appreciated :)

Can someone please EXPLAIN the answer to this question? VV

“The function f is defined by f(x) = 2x^2 - 5. What are all possible values of f(x) where -2<x<2?”

(a) -5 ≤ f(x) < 0
(b) -5 ≤ f(x) < 3
(c) 0 ≤ f(x) < 3
(d) 0 ≤ f(x) < 8
(e) 2 ≤ f(x) < 8

The answer is B. (I got A.)