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![](\"http:\/\/abyss.uoregon.edu\/~js\/images\/correlation.gif\")
This is a package of two integrated programs: Equation Grapher and Regression Analyzer.\nEquation Grapher is a function plotting and analyzing program. It allows you to draw graphs like y=2x and y=sin(x+10)-cos(x). It is possible to have up to 12 graphs plotted at the same time.\nOnce you have plotted a function, Equation Grapher automatically finds roots, maximum\/minimum, intersections etc. It can also calculate and view integration area.\nRegression Analyzer is an analyzing and curvefinding program for statistical data. The program handles the usual regression models such as linear, logarithmic, exponential and power etc. It also supports polynomial models and multiple regressions.\nTo find the best model for your data, simply use the auto function that finds the best model instantly. In the log window next to the graph you will get all necessary information, such as equation and correlation.\nIn both programs you will be able to easily change the range of the graph, either by using the built in zoom functions, or by manually typing in the range values. If you like, you can copy the graph window and paste it into your word processor. Of course, it is possible to save your work and continue at another time.\nBoth programs are easy to use and are well documented with pedagogical help files. With this package you have all you need for drawing and analyzing graphs and statistical data.\nHere are some key features of “Equation Grapher with Regression Analyzer”:\nEquation Grapher \n· Automatically finds roots, maximum\/minimum, intersections etc\n· Calculates and marks integration area\n· Derivative, tangent and normal functions\n· Angles in either degrees or radians\n· Save graphs as BMP\/GIF pictures\nRegression Analyzer \n· Handles all the usual models such as linear, exponential, logarithmic etc\n· Polynomial regression up to 5th grad\n· Multiple regression with up to 5 variables\n· Draw scatter, histogram and lines between the points\n· Send functions to Equation Grapher for further analysis\nBoth \n· Up to 12 graphs in different colors at the same time\n· All the necessary information are written in the log window\n· Very fast, draws most graphs in 0.1 seconds\n· Several zoom functions\n· Change the text of the x- and y-axis\n· Save and open files\n· Print graphs directly on paper\n· Copy and paste graphs into your word processor\n· Possibility to erase individual functions from the graph\n· Pedagogical help file that teaches you how to use the programs\nRequirements:\n· Processor Intel 80486\n· RAM 8 Mb\n· Hard disk 2.3 Mb<\/p>
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