Casio fx-CG10 Advanced Operation Manual page 77

Chapter 1: Polynomial Functions
Sample Solution—Thrill of the Ride (continued)
Before we continue, a caveat is in order here. We do not know that the design
of this particular roller coaster was set up as a quartic model. Furthermore, as
we are about to determine the steepest part, we are assuming that we have a
reasonable perspective, that this section of the ride is approximately
horizontal, to our vantage point. If this is not the case, our results may not be
as accurate as we would like.
As we look at the graph, it seems that the steepest part may be between the
th th
10 and 11
track is starting to level off. Now, we'll investigate to see if the mathematics
matches our visual result. If you're looking at the graph,
Press
We want to see how much the graph is falling compared to how much it is
going horizontally; in other words, we want to measure the slope between
consecutive points. In the S S UB area for L L ist 3, we have typed in a name to
remind us that we are computing the rise over the run.
Highlight the title L L ist 3. Press
( ) for "delta list",
for more options,
points on our scatterplot. After the 11
until you return to the data.
( ) for "delta list",
, (LIST),
to identify List 2,
th
point, it may be that the
twice for more options,
, , (LIST),
to identify List 1, and
twice
.