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Dl the FREE software at http://www.padowan.dk.com/graph/ For 1 and 2, use Function, Insert Relation ------------- To do them manually, as you'd have to do on a test: Solve for y x^2/16-y^2/25=1 {{{y = 5*(sqrt((x^2-16)/16))}}} Pick values for x and solve for y. Remember + and minus values, too. eg x y 4 0 -4 0 5 15/4 -5 15/4 etc. -------------- Plot the points (4,0), (-4,0), 5,15/4) etc.

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