Casio fx9750GII - GRAPH icon (Continued); Graphing Parabolas (y = ax²)

CHAPTER 2 | PG 19
A parabola - multiple representations for y = ax
2
Note:
Make sure that the V-Window is appropriate to see the graphs that you will be
drawing. Enter [SHIFT] [F3] then change the settings to the conditions shown here.
Go back to the Graph Function menu with [EXE] or [EXIT] .
Using, [A=1,2,3] at the end if the equation gives the effect of a ‘dynamic graph’.
Example
Draw the graphs of y = 1x
2
, y = 2x
2
, y = 3x
2
Result
ALPHA
X, θ ,T X, θ ,T
x
2
,
SHIFT
+
ALPHA
X, θ ,T
SHIFT
.
1 , 2 , 3
SHIFT
-
then
EXE
EXE
or
F6
You will see parabolas being drawn one at a time.
SHIFT
F1
then
‘Trace’ either of the three graphs.
Example 2
Draw the graphs of y = -1x
2
, y = -2x
2
, y = -3x
2
Result
ALPHA
X, θ ,T X, θ ,T
x
2
,
SHIFT
+
ALPHA
X, θ ,T
SHIFT
.
- 3 , - 2 , - 1
SHIFT
-
then
EXE
EXE
or
F6
You will see parabolas being drawn one at a time.
SHIFT
F1
then
‘Trace’ either of the three graphs.
fx9750GII