Casio fx-CG10 Advanced Operation Manual page 67

Chapter 1: Polynomial Functions
Sample Solution—Trends in Nightly Rates for Hotels (continued)
One of the graphs will begin flashing. Press to select this graph, or
arrow down to a different graph and then press to select that graph
instead.
The calculator will then compute the minimum of the graph selected.
Press (G-Solv), then (MAX) to find the maximum average
nightly hotel rate for each city. Again, one of the graphs will begin
flashing. Press to select this graph, or arrow down to a different
graph and then press to select that graph instead.
The calculator will compute the relative maximum of the graph selected.
Notice, if there is a second relative maximum on the same curve, arrow
to the right and the calculator will compute the coordinates of that
maximum as well.
Repeat these steps to find the maxima and minima average nightly hotel
rates for each city.