User Manual

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10. Graphing a Conic Section
Important!
• The fx-7400GIII is not equipped with the CONICS mode.
k Graphing a Conic Section
You can use the CONICS mode to graph parabolas, circles, ellipses, and hyperbolas. You can
input a rectangular coordinate function, polar coordinate function, or parametric function for
graphing.
1. From the Main Menu, enter the CONICS mode.
2. Select the function type.
1(RECT).... {rectangular coordinate}
2(POL).... {polar coordinate}
3(PARM).... {parametric}
3. Select the pattern of the function in accordance with the type of graph you want to draw.
R
w
4. Enter the coefficients of the function and draw the graph.
Example To input the rectangular coordinate function
x = 2 y
2
+ y − 1 and graph a
parabola open on the right, and then input the polar coordinate function
r = 4cos θ and draw a circle graph.
1 mCONICS
2 1(RECT) c(X=AY
2
+BY+C) w
3 cwbw-bw6(DRAW)
4 JJ
5 2(POL) cccc(R=2Acos
θ ) w
6 cw6(DRAW)
11. Changing the Appearance of a Graph
k Drawing a Line
The sketch function lets you draw points and lines inside of graphs.
You can select one of four different line styles for drawing with the sketch function.