Function Analysis
u To calculate the focus, vertex and length of latus rectum
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Example | To determine the focus, vertex and length of latus rectum for the | ||
| parabola X = (Y – 2)2 + 3 |
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| Use the following | ||
| Xmin = | Xmax = 10, | Xscale = 1 |
| Ymin = | Ymax = 5, | Yscale = 1 |
mCONICS
w
bwcwdw6(DRAW)
1(FOCS)
(Calculates the focus.)
4(VTX)
(Calculates the vertex.)
5(LEN)
(Calculates the length of latus rectum.)
•When calculating two foci for an ellipse or hyperbolic graph, press e to calculate 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.
•Pressing e when calculating the vertices of an ellipse will calculate the next value. Pressing d will scroll back through previous values. An ellipse has four vertices.
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