The video tutorial reviews the concept of functions, focusing on function notation and evaluation. It provides a step-by-step example of evaluating a function at a specific input, using order of operations to find the output. The tutorial concludes by addressing common issues students may face when evaluating functions.

Why is it important to understand functions, even if they are not the main focus?

• They are only relevant for computer science.

• They are not important at all.

• They are a fundamental concept in mathematics.

• They are only used in advanced mathematics.

What does function notation typically involve?

• Only an input

• Only an output

• Neither input nor output

• An input and an output

How do you evaluate a function at a specific point?

• By using a calculator

• By substituting the point into the function

• By guessing the value

• By asking a teacher

What is the first step in evaluating the function 3 * 3^2 - 1?

• Subtract 1

• Add 1

• Multiply 3 by 3

• Square the 3

What is the final result of evaluating the function 3 * 3^2 - 1?

• 27

• 9

• 1

• 26