Question

If the function f(x) = 2x + 5 is defined, then what is the value of f(-1)?

1) 3
2) 2
3) 1
4) 0

Answer 1

The correct answer to the question is 1) 3.

Step-by-step explanation:

To solve for f(-1) when you have f(x) = 2x + 5, you simply substitute x with -1. Here are the steps:

1. Start with the given function: f(x) = 2x + 5
2. Replace every instance of x with -1: f(-1) = 2(-1) + 5
3. Calculate the multiplication: 2 * (-1) = -2
4. Replace the multiplication result in the equation: f(-1) = -2 + 5
5. Add the numbers: -2 + 5 = 3

So, f(-1) equals 3.