![]() This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.Graph -x 2y=6 using intercepts.įirst, find the x\text\normalsize x 3 Previous Lesson Table of Contents Next Lesson Use a graphing calculator to graph \(y = -\frac\right)\) You may need to look at your calculator's manual to learn how to make a graph and table. ![]() The other brands of graphing calculators work in a similar method, but have different buttons. By default the table starts at 0, but can be changed by selecting Set the interval or the desired x-values can simply be entered into the table. To use the graphing calculator to draw the graph on your paper, use the Table tab. The Zoom level of the screen can be changed by pressing the and − buttons. To get a window with the same scale in the x and y, set the Values of X to −10 10 and the Values of Y to −6 6, then select Confirm. By default, the graph zooms to an auto window that is often huge. The viewing window may need adjusted to see the graph well. Figure 6: (a) The Function tab screen (b) the Graph tab screen on a NumWorks. In the Functions tab, add a new function or edit the existing function. To graph on a NumWorks calculator, press the HOME button and select Functions. Then check to make sure your graph matches the one on the calculator. Use that table to plot points on your paper and draw the line connecting them. Press 2ND then TABLE which is above the GRAPH button. To use the graphing calculator to draw the graph on your paper, use the TABLE button. Figure 4: (a) The WINDOW screen (b) the ZOOM screen on a TI-84. This can easily be set by choosing ZStandard in the Zoom menu. The standard window goes from −10 to 10 in both the x and the y. This can done by pressing the WINDOW button (figure 4a) or by choosing a zoom option in the ZOOM button menu (figure 4b). Figure 3: (a) The Y= screen (b) the GRAPH screen on a TI-84. To see the graph, next press the GRAPH button on the top right (figure 3b). To graph on a TI-84, press the Y= button on the top left. The most commonly used graphing calculator in schools is the TI-84 Plus, but other good graphing calculators are made by other companies such as Casio and NumWorks. For most graphing calculators, the equation will need to be solved for y. Graphing calculators will make a graph of an equation. However, if the the equation models a real-world situation, then consider what values for x are reasonable such as if x represents time, then it should probably only be positive numbers. ![]() The x-values chosen for the table are arbitrary, but usually include both positive and negative numbers. Finally, plot all the points and connect them with a line. Then choose values for the x-variable, and calculate the corresponding value for y. To create a table, start by solving the equation for y. The most basic way to create a graph is to make a table. Graph Equations by Plotting PointsĪn equation in two variables can be represented by a graph. However, a graph of the stocks or indices such as in in figure 1 more easily shows trends which are important for stock traders. For example, the stock market is described by numbers of how stocks or indices are changing. ![]() Equations are useful and descriptive, but a picture of the equation is far more descriptive. credit (wikicommons/Public Domain)Ī picture is worth a thousand words. Graph equations with a graphing utility.įigure 1: Graph of Stock Market Values. ![]()
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