
Drawing a Conics Graph
kDrawing a Circle by Specifying the Coefficients of a General Equation
Example: To draw the circle x2 + y2 + 4x – 6y + 9 = 0
uClassPad Operation
(1)In step (2) of the procedure under “Drawing a Circle by Specifying a Center Point and Radius”, select “AX2 + AY2 + BX + CY + D = 0”.
(2)Substitute the following values for the coefficients: A = 1, B = 4, C =
You can draw an ellipse by specifying coefficients for the standard equation:
(x – H)2 + (y – K)2 = 1.
A2B2
Example: To draw the ellipse (x
2 3
uClassPad Operation
(1)On the Conics Editor window, tap q, or tap [Form] and then [Insert Conics Form].
• This displays the Select Conics Form dialog box.
(2) Select “ | (X – H)2 | + | (Y – K)2 | = 1” and then tap [OK]. | |||
A2 |
| B2 |
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•This closes the Select Conics Form dialog box, and displays the selected equation in the Conics Editor window.
(3)Change the coefficients of the equation as follows: A = 2, B = 3, H = 1, K = 2.
(4)Tap ^to graph the equation.
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