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Graphing Function

Description
Enter the X-Y coordinates for a function and this script will give you the graphing formulas, including Formula, Slope, Y-intercept, Parallel and Perpendicular lines....View A Script Demo


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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="TextPad 4.4">
<LINK href="general.css" rel="stylesheet" type="text/css">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Abraham I. (abraham_824@hotmail.com) -->
<!-- Begin
function calculate() {
var y = new Array();
y[0] = null;
y[1] = document.calculator.y1.value;
y[2] = document.calculator.y2.value;
var x = new Array();
x[0] = null;
x[1] = document.calculator.x1.value;
x[2] = document.calculator.x2.value;
var m = (y[2] - y[1]) / (x[2] - x[1]);
var b = y[1]-(m * x[1]);
var formula = "y="+m+"x + "+b;
var rand = parseInt(Math.random() * 7);
var parf = "y="+m+"x + "+rand;
var newm = m / -1;
var perf = "y="+newm+"x + "+b;
document.calculator.formula.value = formula;
document.calculator.slope.value = m;
document.calculator.yint.value = b;
document.calculator.parf.value = parf;
document.calculator.perf.value = perf;
}
//  End -->
</script>

</HEAD>

<BODY Background=../graphics/grayback.jpg>
<center><BR><BR><BR>
<form name="calculator">
Enter coordinate values:
<table border=0>
<tr>
<td>X1:</td>
<td><input type=text name=x1 size=10></td>
</tr>
<tr>
<td>Y1:</td>
<td><input type=text name=y1 size=10></td>
</tr>
<tr>
<td>X2:</td>
<td><input type=text name=x2 size=10></td>
</tr>
<tr>
<td>Y2:</td>
<td><input type=text name=y2 size=10>
<input type=button value="Get Results" onClick="calculate();"></td>
</tr>
<tr>
<td>Formula:</td>
<td><input type=text name=formula size=50></td>
</tr>
<tr>
<td>Slope:</td>
<td><input type=text name=slope size=50></td>
</tr>
<tr>
<td>Y-Intercept:</td>
<td><input type=text name=yint size=50></td>
</tr>
<tr>
<td>Parallel Line Formula:</td>
<td><input type=text name=parf size=50></td>
</tr>
<tr>
<td>Perpendicular Line Formula:</td>
<td><input type=text name=perf size=50></td>
</tr>
</table>

</center>
</BODY>
</HTML>
 

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