# Inequality Grapher

## Description

Inequality Grapher is a full featured Graphing Utility that supports graphing multiple functions together, and shading the areas less than or greater than the function(s).

It can be used to solve sets of inequality questions, and is useful in linear programming.

## Usage

### To plot a function just type it into the function box. Use "x" as the variable.

Examples:

- sin(x)
- 2x-3
- cos(x^2)
- (x-3)(x+3)

### Zooming and Re-centering

To zoom into an area, select an area with the mouse (click, hold down and drag, then release). The area you selected will be the new bounds. This may result in the x and y scales being different if "Equal Scales" is not on.

If you just click-and-release (without creating a rectangle), then the spot you clicked will be the new center.

You can zoom in or out out using the Zoom Slider. The slider resets to the middle when you release it so you can zoom again and again. You can also use the ** Out 10x** button.

To reset the zoom to the original bounds click on the **Reset** button.

After clicking on the graph you can use the arrow keys (up, down, left and right) to move the graph around.

Use them in combination with the shift key for fine adjustments.

### Using "a" Values

There is a slider with "a=" on it. You can use "a" in your formula and then use the slider to change the value of "a" to see how it affects the graph.

Examples:

- x^a
- 2x-3a
- sin(a*x)

Note how I used **a*x** to multiply **a** and **x**. If I used **ax** (or **xa**) the program just gets confused.

## Saving Your Work

You can print using the print button.

You can save the graph to disk.

The "svg" button will save the graph as a "Scalable Vector Graphics" file which can be edited using programs like Inkscape. Titles and numbers are not currently included, just the bare graphics.

## All Functions

### Operators

+ | Addition operator | |
---|---|---|

- | Subtraction operator | |

* | Multiplication operator | |

/ | Division operator | |

^ | Exponent (Power) operator |

### Functions

sqrt |
Square Root of a value or expression. | |
---|---|---|

sin |
sine of a value or expression | |

cos |
cosine of a value or expression | |

tan |
tangent of a value or expression | |

asin |
inverse sine (arcsine) of a value or expression | |

acos |
inverse cosine (arccos) of a value or expression | |

atan |
inverse tangent (arctangent) of a value or expression | |

sinh |
Hyperbolic sine (sinh) of a value or expression | |

cosh |
Hyperbolic cosine (cosh) of a value or expression | |

tanh |
Hyperbolic tangent (tanh) of a value or expression | |

exp |
e (the Euler Constant) raised to the power of a value or expression | |

ln |
The natural logarithm of a value or expression | |

log |
The base-10 logarithm of a value or expression | |

floor | Returns the largest (closest to positive infinity) value that is not greater than the argument and is equal to a mathematical integer. | |

ceil | Returns the smallest (closest to negative infinity) value that is not less than the argument and is equal to a mathematical integer. | |

abs | Absolute value (distance from zero) of a value or expression | |

sign | Sign (+1 or -1) of a value or expression | |

### Constants

pi | The constant π (3.141592654...) | |
---|---|---|

e | Euler's number (2.71828...), the base for the natural logarithm |