User guide

You will notice that you have options labeled Max, Min, fMax, fMin.
Using Max or Min finds the global maximum or the global maximum for
the given function. Using fMax or fMin will locate the local maximums or
minimums based on the window specifications. In our example, our minimum
x value is −10 so the local maximum y-value on this interval will be f(−10) =
90. We see the coordinate pair (−10, 90). Note that (10, 90) is also on the
graph. Because the coordinate (−10, 90) comes first, assuming left to right,
the calculator reports (−10, 90) versus (10, 90). You may toggle using the
hard arrows to the other coordinate (10, 90).
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