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4-1 Inputting an Equation
You can select one of the preset Conics Forms or input a conics equation manually. You can also transform a
manually input equation to a Conics Form.
u To input an equation using a Conics Form
1. On the Conics Editor window, tap q to displays the
Select Conics Form dialog box.
2. Select the Conics Form of the type of equation you
want to graph, and then tap [OK].
• This displays the Conics Editor window, which will
contain the selected Conics Form.
3. Change the parameters of the equation as required.
0401
To use a Conics Form to input the equation for a parabola with a horizontal axis (principal axis parallel
x
with
-axis)
u To input an equation manually
Make the Conics Editor window active, and then use the soft keyboard for input.
u To transform a manually input equation to a Conics Form
0402
To transform the equation
Tip
• If the equation you input cannot be transformed into the standard Conics Form you selected, the message "Can't
Transform into This Type" appears.
• An input equation may not transform correctly if it includes a square root calculation or some other function.
4-2 Drawing a Conics Graph
Tip:
You can drag the Conics Graph window screen to scroll (pan) its contents (except for Trace, Sketch, G-Solve, box
zoom, and certain other functions).
Drawing a Parabola
A parabola can be drawn with either a horizontal or vertical orientation. The parabola type is determined by the
direction of its principal axis.
• A parabola with a horizontal axis is one whose principal axis is parallel to the
equations for a parabola with a horizontal axis:
x
y
2
= A(
– K)
+ H and
0401
To draw the parabola
• A parabola with a vertical axis is one whose principal axis is parallel to the
equations for a parabola with a vertical axis:
y
x
= A(
– H)
2
+ K and
(
[
− 1)
2
\
+ (
2
2
x
y
2
y
= A
+ B
+ C.
x
y
2
= 2(
– 1)
– 2
y
x
x
= A
2
+ B
+ C.
[
2
2
to the standard Conics Form
− 2)
=
4
Horizontal Parabola 1
Horizontal Parabola 2
Vertical Parabola 1
Vertical Parabola 2
Circle 1
Circle 2
Ellipse
Horizontal Hyperbola
Vertical Hyperbola
General Form
x
y
= A
2
+ B
x
-axis. There are two possible
y
-axis. There are two possible
Chapter 4: Conics Application 119
y
+ C
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