The variables panel allows you to modify the value of any free variable and update several graphs without editing a single equation.

__Edit boxes__

In the top ("a=") section,

from |
is the value to start calculating the value of the parameter `a ` from. |

to | is the maximum value `a ` can take (or minimum if step by is negative) |

step by | is the amount to increment `a ` by between each graph. |

Uses of `a`

are described in Graphing Families of Functions.

b = |
is the value to assign to the free variable `b` |

c = |
is the value to assign to the free variable `c` |

j = |
is the value to assign to the free variable `j` |

k = |
is the value to assign to the free variable `k` |

Uses of `b`

, `c`

,` j`

, and` k`

are described in Using Free Variables.

The other lines are reminders of the values of the built-in constants.

__Buttons__

**Update** finds all equations using the free variables you have most recently modified and makes a copy of each one using the new value(s), then graphs the new equations. This allows you to modify the value of a parameter in several equations simultaneously without editing any of them!

**Help** calls up this help screen

kSoft, Inc. ksoft@graphmatica.com Last updated: Sun 11 Jun 2017