<html>
<head>
<?php
$a= -7; $b= 6;
$n=1001; $m=500; $x = array(); $y = array();
for ($i=0; $i<=$m; $i++) { $x[]=$a+($b-$a)/$m*$i; };
for ($i=0; $i<=$m; $i++) { $y[] =
pow($x[$i]-1,2)/2-3
; };
for ($i=$m+1; $i<=$n; $i++) { $x[]=$a+($b-$a)/$m*($i-501); };
for ($i=$m+1; $i<=$n; $i++) { $y[] =
5-2*$x[$i]
; };
$dataPoints = array(
array("x" => $x[0], "y" => $y[0]),
array("x" => $x[1], "y" => $y[1]),
array("x" => $x[2], "y" => $y[2]),
array("x" => $x[3], "y" => $y[3]),
array("x" => $x[4], "y" => $y[4]),
array("x" => $x[5], "y" => $y[5]),
array("x" => $x[6], "y" => $y[6]),
array("x" => $x[7], "y" => $y[7]),
array("x" => $x[8], "y" => $y[8]),
array("x" => $x[9], "y" => $y[9]),
array("x" => $x[10], "y" => $y[10]),
array("x" => $x[11], "y" => $y[11]),
array("x" => $x[12], "y" => $y[12]),
array("x" => $x[13], "y" => $y[13]),
array("x" => $x[14], "y" => $y[14]),
array("x" => $x[15], "y" => $y[15]),
array("x" => $x[16], "y" => $y[16]),
array("x" => $x[17], "y" => $y[17]),
array("x" => $x[18], "y" => $y[18]),
array("x" => $x[19], "y" => $y[19]),
array("x" => $x[20], "y" => $y[20]),
array("x" => $x[21], "y" => $y[21]),
array("x" => $x[22], "y" => $y[22]),
array("x" => $x[23], "y" => $y[23]),
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array("x" => $x[25], "y" => $y[25]),
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