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Casio fx-9750G PLUS User Manual

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14-3 Conic Section Graph Analysis

You can determine approximations of the following analytical results using conic
section graphs.

• Focus/vertex calculation
• Latus rectum calculation
• Center/radius calculation

x

-/

y

-intercept calculation

• Directrix/axis of symmetry drawing and analysis
• Asymptote drawing and analysis

After graphing a conic section, press 5 (G-Solv) to display the Graph Analysis
Menu.

Parabolic Graph Analysis
{FOCS} ... {determines the focus}
{SYM}/{DIR} ... draws the {axis of symmetry}/{directrix}
{VTX}/{LEN} ... determines the {vertex}/{latus rectum}

Circle Graph Analysis
{CNTR}/{RADS} ... determines the {center}/{radius}

Ellipse Graph Analysis
{FOCS}/{X-IN}/{Y-IN} ... determines the {focus}/{x-intercept}/{y-intercept}

Hyperbolic Graph Analysis
{FOCS}/{X-IN}/{Y-IN}/{VTX} ... determines the {focus}/{x-intercept}/{y-intercept}/

{vertex}

{ASYM} ... {draws the asymptote}

The following examples show how to use the above menus with various types of
conic section graphs.

u

u

u

u

u

To calculate the focus and vertex

[G-Solv]-[FOCS]/[VTX]

Example

To determine the focus and vertex for the parabola
X = (Y – 2)

2

+ 3

Use the following View Window parameters.
Xmin = –1

Ymin = –5

Xmax = 10

Ymax = 5

Xscale = 1

Yscale = 1

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