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229
uu
uu
uTo calculate the focus and vertex
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
5 (G-Solv)
1 (FOCS)
(Calculates the focus.)
5 (G-Solv)
4 (VTX)
(Calculates the vertex.)
• When calculating two foci for an ellipse or hyperbolic graph, press e to calcu-
late the second focus. Pressing d returns to the first focus.
• When calculating two vertexes for a hyperbolic graph, press e to calculate the
second vertex. Pressing d returns to the first vertex.
uu
uu
uTo calculate the latus rectum
Example To determine the latus rectum 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
5 (G-Solv)
1 23456
123456
123456
Implicit Function Graph Analysis 14 - 3
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