Re: Graphing x= on TI-86
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Re: Graphing x= on TI-86
> all y and x equations can be solved for y
Umm, would you please solve y^x = x^y ?
(Yes, there _are_ particular solutions, such as x=2 and y=4).
Actually, any equation in two variables (say x and y) represents a _relation_,
really the set of pairs (x,y) that satisfy the equation. The relation may or
may not represent a function, depending on the particular set of points in the
relation. Even if it does represent a function (looked at in either the x- or
y-direction) it may not be possible to algebraically solve the given equation
to arrive at a clearly-stated function definition.
Having in our hands the technology represented by the TI-89 (even the TI-86)
means that we have escaped from the sheltered pond represented by the
traditional algebra class, and have to cope with the stormier swells....
RWW Taylor
National Technical Institute for the Deaf
Rochester Institute of Technology
Rochester NY 14623
>>>> The plural of mongoose begins with p. <<<<