**TI83, TI84, Graphing Calculator Quick Help Guide**

Action |
TI83-84 |
---|---|

To set screen contrast |
2nd |

I'm lost; return to home screen |
2nd QUIT |

Erase a whole expression or equations |
CLEAR |

Editing |
Left or right arrow DEL 2nd INS (inserts characters) |

Find the nth root |
MATH; xth root key |

Exponent |
^ |

Absolute Value |
MATH; NUM; abs( |

Graphing |
Y= (enter expression; use the X,T,q ,n key for X); GRAPH |

Changing graph line style |
\Y1= arrow to |

Turning entered graphs on or off |
\Y1= arrow to =; hit ENTER to toggle on or off |

Change scale or zoom |
ZOOM note: after picking zoom type, hit ENTER again for zoom effect; continuing to hit ENTER continues zooming |

Change scale manually |
WINDOW |

Tracing graphs |
TRACE; If multiple graphs jump using |

Find value of a function Y1 at any X |
2nd CALC; value; (shows graph, X=; enter X); or from home screen VARS; Y-VARS; Function; Y1 (your x here); e.g. Y1(4) gives 6 if Y1=X+2 |

Stop a plot |
Hit ON |

List values of Y1 (or Y2 etc. ) |
2nd TABLE |

Adjust table values (domain) |
2nd TBLSET; change start value and/or increment |

To clear all lists |
2nd MEM; ClrAllLists |

Find line of best fit for data Note: other types are available |
STAT; EDIT; enter values in L1,L2 (use arrow keys) |

Plot the line of best fit |
Y=; VARS; Statistics…; EQ; RegEQOr manually enter the equation after Y= |

Plot individual points |
STAT; EDIT; enter values in L1,L2; Y= up arrow to Plot1; ENTER to turn on Plot1; GRAPH |

Turning points off | 2nd STAT PLOT Plot1 Off |

Graphing a relation, e.g. the circle |
Solve for Y; enter +/- cases as two functions Y1= Y2= |

Finding the zero of a function | Graph the function; 2nd CALC, zero, arrow to left of zero and ENTER, arrow to right of zero and ENTER, ENTER for guess |

Graph a piecewise defined function |
Y=; enter as Y1= (function) / (interval); Y2= (function) / (interval), etc |

Enter a matrix |
MATRIX; EDIT; (asks for size) |

Use the matrix in calculations |
From home screen; MATRIX; NAMES: |