Suppose
you have the following data on the
|
Year |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
|
Federal Debt (millions of $) |
3.599 |
4.002 |
4.351 |
4.644 |
4.921 |
5.182 |
5.370 |
5.479 |
5.606 |
5.629 |
5.770 |
1.)
First, get your calculator into the right mode:
STAT, then EDIT, then 1:EDIT
2.)
Now, clear lists L1 and L2: (if they are already clear, you can skip this
step)
- with the “up arrow”, move
the cursor to L1
- CLEAR, then ENTER
- repeat for L2
3.)
Enter data into L1:
1991 ENTER
1992 ENTER….
2001 ENTER
4.)
Enter data into L2:
3.599 ENTER
4.002 ENTER….
5.770 ENTER
5.)
If you’d like to align the data with 1990 as your base year:
- with the “up arrow”, move
the cursor to L1
- 2nd, then L1
- “-“ then 1990
-
ENTER
6.)
Back to home screen: 2nd QUIT
Now,
suppose you want a scatter plot:
1.)
Make sure all plots in Y= list are turned off or cleared.
2.)
Set the plot up:
- 2nd, then STAT PLOT
- 1:PLOT1, then ENTER
- ON, then ENTER
- Type: select scatter plot
- Xlist: L1, Ylist: L2
- Mark: select box
3.)
To get a plot: ZOOM, then 9:ZoomStat
To get a
“Best Fit” line:
1.)
STAT, then CALC
2.)
4:LinReg, then ENTER
3.)
VARS, then Y-VARS
4.)
1:FUNCTION
5.)
1:Y1, then ENTER
NOTE: This should take you back to the
home screen, with a command
that looks like: LinReg(ax+b) Y1
7.)
ENTER
8.)
Check to see if the equation is in the Y= list, by pressing Y=
9.)
To graph, just hit GRAPH
10.)
To plug x-values into the new function:
- VARS, then Y-VARS
- 1:FUNCTION
- 1:Y1, then ENTER
- open up left parentheses “(“, key in your number,
then right parentheses “)”
- ENTER