Chapter 3: Function Graphing
77
•
Changed the value of a variable in a selected function
•
Changed a window variable or graph format setting
•
Cleared drawings by selecting
ClrDraw
•
Changed a stat plot definition
Overlaying Functions on a Graph
On the TI-84 Plus, you can graph one or more new functions without replotting existing functions.
For example, store
sin(X)
to Y1 in the Y= editor and press
s
. Then store
cos(X)
to Y2 and
press
s
again. The function Y2 is graphed on top of Y1, the original function.
Graphing a Family of Curves
If you enter a list (Chapter 11) as an element in an expression, the TI-84 Plus plots the function for
each value in the list, thereby graphing a family of curves. In Simul graphing-order mode, it graphs
all functions sequentially for the first element in each list, and then for the second, and so on.
{2,4,6}sin(X)
graphs three functions:
2 sin(X)
,
4 sin(X)
, and
6 sin(X)
.
{2,4,6}sin({1,2,3}X)
graphs
2 sin(X)
,
4 sin(2X)
, and
6 sin(3X)
.
Note:
When using more than one list, the lists must have the same dimensions.
