Sharp EL9900C EL-9900C - Page 75

Chapter 4: Basic Graphing Features - Basic Keyboard 2. Press 2 E. (2 is input to A.) The graph for "Y1 = 2X2" is drawn. (Since B and C have no values, they are ignored.) At this time, the graph for Y2 is also drawn. Y2 also uses variable A which is used in Y1. Therefore, the drawing of the graph for Y2 is also valid. * If you need to draw only the graph for Y2, it is necessary to change variables (characters) or make the graph drawing for Y1 invalid. 3. Press 1 E. (1 is input to B.) The graph is changed from "Y1 = 2X2" to "Y1 = 2X2 + 1X". 4. Press _ 3 E. (-3 is input to C.) Now, the graph for "Y1 = 2X2 + 1X - 3" is drawn on the screen. Next, change variable A from 2 to 5 and see how the graph changes. 1. Press { { 5 E. (The cursor is moved from C to A and 5 is input.) The slope of the graph becomes sharp. * Move the cursor accordingly and substitute other numeric values for variables to view how the graph changes. * The trace function cannot be used in the substitution feature. (When U is pressed, the full-screen graph will appear.) 65