# SAT Math Multiple Choice Practice Question 485: Answer and Explanation

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**Question: 485**

**5.** If *f*(3) = 6 and *f*(4) = 13, then which of the following could be *f*(*x*) ?

A. *x* + 3

B. 2*x*

C. 3*x* + 1

D. *x*^{2} – 2

E. *x*^{2} – 3

**Correct Answer:** E

**Explanation:**

**E** Plug 3 into each answer choice, and try to get 6. Eliminate C and D. Now plug 4 into each remaining answer choice, and try to get 13. Eliminate A and B.