Casio FX-9750G, FX-9860GII ICalculating the Point of Intersection of Two Graphs, Example, Y1 = x + 1, Y2, intersection between Y1 and Y2

(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 Uto 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

ICalculating 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 Uto select the first graph, which changes the shape of the cursor from Ito R.

5.Press D and A to move the cursor to the second graph.

6.Press Uto 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

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