College Math Placement Practice Test 2026 - Free College Math Questions and Study Guide

To determine the value of f(-1) for the function f(x) = 3x + 2, we need to substitute -1 into the function in place of x.

Starting from the equation:

f(-1) = 3(-1) + 2

Now, perform the multiplication:

f(-1) = -3 + 2

Next, add the two numbers together:

f(-1) = -3 + 2 = -1

Upon evaluating f(-1), the correct value is -1. This indicates that the function outputs -1 when the input is -1, making it essential to follow through the calculation process step by step to ensure accuracy in results.

The other answer choices do not reflect the proper calculations derived from the function, as they involve either incorrect arithmetic or misunderstandings of the function's linear nature.