Name: How Do You Evaluate a Function?
Uploaded: 2023-07-26T06:54:19.424Z
Channel: House of Math
Description: Evaluating a function involves inputting a number and calculating the output. The input is usually x, and the output, f(x) or y. This video explains more.

Evaluating a function involves inputting a number and calculating the output. The input is usually x, and the output, f(x) or y. This video explains more.

A function is a relationship between two — or more — variables. If you input a number into a function, it can only output one value.

Every point in the coordinate system has coordinates of the form 

. The first coordinate tells you where the point is along the 

-axis, and the second coordinate tells you where the point is placed along the 

. By plotting these in a coordinate system you can visualize the relationship between the input, 

, of the function. This is what we mean by drawing a graph.