Set 4: Linear Functions (Beginner)

**Choice B is the best answer.** f(3) = 7(3) - 7 = 14

Explanation

Answer: B

PROBLEM

If f(x) = 7x - 7, find f(3).

✓ Correct

Detailed Explanation

Choice B is the best answer. f(3) = 7(3) - 7 = 14

Why others are wrong:

A: 21 is incorrect because it does not satisfy the equation.

C: 28 is incorrect because it does not satisfy the equation.

D: 0 is incorrect because it does not satisfy the equation.