Sharp EL-9900 Handbook Vol. 1 Operation Manual page 8

Step & Key Operation
3
1
Enter the equation y = - x for Y2.
-
Y= CL
3
2
-
View both graphs.
GRAPH
4
1
- Enter the equation y = x + 2 for
Y2.
Y= CL
4
2
View both graphs.
-
GRAPH
Making a graph is easy, and quick comparison of several graphs will help
students understand the characteristics of linear equations.
3-1
-
n
( )
X/ /T/
+
n
2
X/ /T/
EL-9900 Graphing Calculator
Display
Notice how Y2 decreases
(going down from left to
right) instead of increasing
(going up from left to right).
Negative slopes (m<0) make
the line decrease or go
down from left to right.
Adding 2 will shift the y = x
graph upwards.
Notes