College Math CLEP Prep Practice Exam

If f(x) = 3x + 5, what is the value of f(0)?

1. 5

2. 15

3. 0

4. 3

The correct answer is: 5

When solving for f(x), we can simply substitute x with 0. Therefore, f(0) = (3)(0) + 5 = 0 + 5 = 5. Option B is incorrect because when solving for f(0), we cannot simply multiply 3 and 0 and then add 5. We must perform the operation in the correct order 3(0) + 5 = 0 + 5 = 5. Option C is incorrect because f(0) cannot equal 0 since the constant in the function f(x) is 5. Option D is incorrect because when solving for f(0), we cannot simply take the coefficient of x, which is 3, and make that the answer. We must still perform the operation: 3(0) + 5 = 0 + 5 =