Casio fx-CG10 Advanced Operation Manual page 85

Chapter 6: Conic Sections
Sample Solution—Throwing High
a. Determine how high up the ball will go. Explain your result.
Using our equation,
function then press
function, change the view window settings by selecting
setting X X min: 0, X X max: 4, and a s s cale of 1. Press
adjust the Y Y min: and Y Y max:
Press
With the graph displayed, we can find the maximum height:
Press
This tells us that the ball reaches its maximum height, just over 45 feet,
approximately 1.56 seconds after we threw it.
b. Determine when the ball will hit the ground. Explain your result.
Another feature of G-Solve allows us to find the roots of functions. A root is an
x-intercept, which, in this case, tells us when the ball hits the ground (Note:
that the y-value is 0). Again we will access G-Solve, but this time we'll press
to find the root.
2
y 16 x 50
(DRAW) to view the graph. After exploring the
(Zoom) and
(G-Solv) followed by
x 6 , from the GRAPH menu, input the
(Auto).
(MAX):
(V-Window)
then (DRAW); to
and