To evaluate a function is to: Replace (substitute) any variable with its given number or expression. Like in this example:

To evaluate a function, what we want is to substitute every instance of x x in the expression and then simplify. Since x = 1 x = –1 , we substitute this value in the function and simplify.

In this video, we’ll cover how to evaluate functions using formulas, tables, and graphs with clear explanations and real examples.

Evaluating a function gives you a y-value for an x-value. Evaluating a function means to find a y-value for a specific x-value. For example, if you have the function f (x) = 2x, evaluating the …

In the following video we offer more examples of evaluating a function for specific x values.

Dec 15, 2024 · While the notation and wording is different, the process of evaluating a function is the same as evaluating an equation: in both cases, you substitute 2 for x, multiply it by 4 and …

Jan 5, 2024 · Not only will you learn the fundamentals of rational numbers and their impact on function outputs, but you'll also find step-by-step instructions and practical examples on how to …

You can use an online graphing calculator to graph functions, find function values, and evaluate functions. Watch this short tutorial to learn how to within Desmos.

Oct 21, 2025 · Today we are going to take a look at evaluating functions and expressions. All this requires is plugging in different values for variables and simplifying. Let’s start with a super …

Dec 3, 2025 · Sometimes when mapping between an input and output, the input can be another function that maps to another input. This is called a composite function. When evaluating a …