# How to Graph Functions

A mathematical function is actually a formula that requires an input, x, applies a pair of calculations to it and creates an output known as y. By determining a function at a sizable number of set intervals, it is possible to produce a scatter plot of a function.

Here are some steps to graph functions:

Step 1

Create the headers for the data table. Enter the output variable in cell B1 and the input variable within cell A1. If you want, you can use the mathematical standards x and y or you may use something more descriptive for example profit and sales.

Step 2

Enter the first and second interval of one's input variable (for example, sales or x), which you will use to plot the function. For instance, if your intervals are whole numbers, you could start by entering 2 into cell A3 and 1 into cell A2. Choose both of these cells and then click and drag the tiny black square in the lower-right corner from the selection area downwards till you have as much values as you want to plot.