4
Answer: CSet 2: Linear Functions (Intermediate)
Explanation
PROBLEM
If f(x) = 2x + 4, what is f(5) - f(3)?
If f(x) = 2x + 4, what is f(5) - f(3)?
A.
8
B.
2
C.✓ Correct
4
D.
6
Detailed Explanation
Choice C is the best answer. f(5) = 14, f(3) = 10. 14 - 10 = 4
Why others are wrong:
A: 8 is incorrect because it does not satisfy the equation.
B: 2 is incorrect because it does not satisfy the equation.
D: 6 is incorrect because it does not satisfy the equation.