Question 1: Evaluate f(3) if f(x) = 2x + 5.

Answer: 11

Question 2: Calculate the value of f(-4) given f(x) = -3x + 2.

Answer: 14

Question 3: If f(x) = x^2 - 4x, what is the value of f(5)?

Answer: 5

Question 4: Evaluate f(0) where f(x) = 4x - 7.

Answer: -7

Question 5: Find f(2) if f(x) = 3x + 1.

Answer: 7

Question 6: A student evaluates f(4) where f(x) = 2x + 3 and writes the answer as 11. Is this correct? Explain your reasoning.

Answer: No, because 2×4 + 3 = 8 + 3 = 11, which is correct. The student’s answer is correct.

Question 7: Evaluate f(-2) if f(x) = -x^2 + 4x.

Answer: 8

Question 8: What is the value of f(10) if f(x) = x/2 - 3?

Answer: 2

Question 9: Construct a graph on the grid for the function y=2x. Label the key points.

Answer: Students plot points at (0,0), (1,2), (2,4), etc.

Question 10: Evaluate f(6) for the function f(x) = 5x - 4. Be careful with calculations.

Answer: 26

Question 11: A student evaluates f(3) where f(x) = 2x + 5 and writes the answer as 13. Is this correct? Explain your reasoning.

Answer: No, because 2×3 + 5 = 6 + 5 = 11. The student’s answer is incorrect.

Question 12: Identify and correct the mistake in evaluating f(x) = x^2 - 4x at x=3 when a student gets 3 as the answer.

Answer: The mistake was substituting x=3 directly. Correct calculation: 3^2 - 4×3 = 9 - 12 = -3.