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General

General questions about using GraphFree and other topics that don't fit elsewhere.

List of Built-in Functions

Basic Math & Algebra abs (absolute value) sqrt (square root) cbrt (cube root) nthroot (nthroot(5, x) is the fifth root of x.) Logarithms ln (natural logarithm) log (base 10 logarithm) logb (logb...
How to Enter Expressions

Note: Many of the examples include spaces for readability, but the spaces are never required. Basic Examples 4x+2 sin(x) x(x+1)(x+3) 3 / (x + 2) Exponents x^2 e^(x + 2) 2^-x sin^2(x) can be used...
Plot Sizes

Valid Range The dimensions of a plot must be between 100 and 900 pixels. Just the Grid Area The width and/or height you specify refer only to the dimensions of the grid. They do not include the mar...
Entering Custom Colors

You may enter custom colors in either hex or HSL format. As Hex Codes You may use 3 or 6 character hex format. #ff9999 #5ed You may also enter captial letters, but GraphFree will reformat them to...
Shading

Basic Shading You can shade the region above, below, or between curves in GraphFree by entering a single point in the interior of the region you wish to shade. Be sure to pick a point that is clea...
Labels in Terms of Pi

GraphFree automatically detects when your gird labels are common fractions of π and labels them accordingly. (If you’re used to older versions of the site, this is why there is no longer a separate...
The Plots Panel

To add a new plot, click the Add New Plot button, and select the type of plot you wish. The types of plots available differ according to the grid type you are working on. The menu show below is the...
Graphing Vertical Lines

There are two different ways to graph a vertical line in GraphFree. One is to use the Conic/Implicit plot. The other is to use the Asymptote plot. Both plot types now have the full range of dash ty...
Adding Math Symbols to Texts

There are multiple ways to add special mathematical symbols and other non-keyboard characters to your texts. All of these methods work for captions, annotations, axis labels, and legend texts. The ...
Positioning Texts on the Graph

There are two ways to reposition the various texts on your graph. The techniques described here apply to any text—axis labels, grid labels, captions, annotations, etc. Left Click and Drag Position ...
Open Circles & Discontinuities

In the old GraphFree site, you sometimes needed to use a separate scatter plot to add an open circle to a graph with a discontinuity. In the new site, however, this hack is no longer necessary. Yo...