Casio fx-CG10 Advanced Operation Manual page 63

Chapter 1: Polynomial Functions
Sample Solution—Trends in Nightly Rates for Hotels (continued)
g. For each city, determine in what years the average nightly rate of hotels was
increasing and in what years was it decreasing?
To use the regression equation to analyze trends of the nightly hotel rates as a
function of time in years, we first need to copy the equations into the Y Y =
prompts. To do this, return to the screen that includes the quartic regression
equation for Baltimore. [Notice, you may need to construct the scatterplot and
conduct the quartic regression again to access this screen.]
At this screen, press
Y1= prompt.
Now, repeat these instructions for Charlotte and Milwaukee. Notice, you
will copy the equation for Charlotte into Y Y 2 and Milwaukee's equation
into Y Y 3.
Table:
To create a table using the calculator:
Press
Notice, the regression equations are already copied into Y Y 1, Y Y 2, and Y Y 3.
(COPY) to copy the regression equation to the
to return to the Main Menu and to access the Table mode.