Casio FX-9750GII-SC User Guide - Page 137
Calculating the Point of Inter of Two Graphs, Example, Graph the two functions shown below - calculator graphing
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(Y-ICPT) ... y-intercept (ISCT) ... Intersection of two graphs (E)(Y-CAL) ... y-coordinate for given x-coordinate (E)(X-CAL) ... x-coordinate for given y-coordinate (E)(°dx) ... Integral value for a given range 4. When there are multiple graphs on the screen, the selection cursor (I) is located at the lowest numbered graph. Press D and A to move the cursor to the graph you want to select. 5. Press U to select the graph where the cursor is located and display the value produced by the analysis. When an analysis produces multiple values, press C to calculate the next value. Pressing B returns to the previous value. • Either of the following can cause poor accuracy or even make it impossible to obtain solutions. - When the graph of the solution obtained is a point of tangency with the x-axis - When a solution is an inflection point I Calculating the Point of Intersection of Two Graphs Use the following procedure to calculate the point of intersection of two graphs. 1. Draw the graphs. 2. Press (G-SLV)(ISCT). When there are three or more graphs, the selection cursor (I) appears at the lowest numbered graph. 3. Press D and A to move the cursor to the graph you want to select. 4. Press U to select the first graph, which changes the shape of the cursor from I to R. 5. Press D and A to move the cursor to the second graph. 6. Press U to calculate the point of intersection for the two graphs. When an analysis produces multiple values, press C to calculate the next value. Pressing B returns to the previous value. Example Graph the two functions shown below, and determine the point of intersection between Y1 and Y2. Y1 = x + 1, Y2 = x2 5-31