**Introduction**

This program plots the slope field for the differential equation in the
form .

If you have not used one of the programs posted on this website before,
you should read through
the information in the Intro to Programming
section first.

**The Program **

:ClDrw | {ClDrw is in GRAPH under Draw} |

:FnOff | {FnOff is in GRAPH under Vars} |

:7*(xMax-xMin)/83H | {xMax, xMin are in GRAPH under Range} {The arrow is STO} |

:7*(yMax-yMin)/55K | {yMax, yMin are in GRAPH under Range} |

:1/(0.4*H)^2A | |

:1/(0.4*K)^2B | |

:xMin+0.5*Hx | {x is x-VAR} |

:yMin+0.5*KZ | |

:1L | {The 1 is a one} |

:Lbl P | {Lbl is in PRGM under CTL} |

:1J | |

:Zy | {y is in GRAPH under Vars} |

:Lbl Q | |

:y1T | {y1 is in VARS under EQU} |

:1/(A+B*T^2)C | is the square root button. |

:T*CS | |

:Line(x-C,y-S,x+C,y+S) | {Line is in GRAPH under Draw} |

:Z+J*Ky | |

:IS>(J,8) | {IS> if in PRGM under CTL} |

:Goto Q | {Goto is in PRGM under CTL} |

:x+Hx | |

:IS>(L,12) | |

:Goto P |

**Running the Program**

You will need to enter a function *f*(*x,y*) into y1 and adjust the RANGE accordingly
before running the program. You can use the x and y shown in the
GRAPH menu.