4-2-1

Inputting Equations

4-2 Inputting Equations

This section explains the various ways you can input equations using the Conics Editor window.

Using a Conics Form to Input an Equation

Preset formats can help you input conics equations quickly and easily. The following table contains a complete list of the types of equations that you can input just by tapping [Form] and then [Insert Conics Form].

Conics FormsEquations

 

Horizontal Parabola 1

 

x = A·(y – K)^2 + H

 

Horizontal Parabola 2

 

x = A·y^2 + B·y + C

 

Vertical Parabola 1

 

y = A·(x – H)^2 + K

 

Vertical Parabola 2

 

y = A·x^2 + B·x + C

 

Circle 1

 

(x – H)^2 + (y – K)^2 = R^2

 

 

 

Circle 2

 

A·x^2 + A·y^2 + B·x + C·y + D = 0

 

Ellipse

 

(x – H)^2 ⎟ A^2 + (y – K)^2 ⎟ B^2 = 1

 

 

 

Horizontal Hyperbola

 

(x – H)^2 ⎟ A^2 – (y – K)^2 ⎟ B^2 = 1

 

 

 

Vertical Hyperbola

 

(y – K)^2 ⎟ A^2 – (x – H)^2 ⎟ B^2 = 1

 

 

 

General Form

 

A·x^2 + B·x·y + C·y^2 + D·x + E·y + F = 0

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