Enter Data (1)
> press LIST and type ordered pairs in L1 and L2
(hint: to quickly clear an old list, go to the top and press CLEAR)
To look at a scatterplot
To find the model (equation)
> press 2nd STAT, CALC
> press LinReg, QuadReg, or ExpReg... (for linear, quadratic, and exponential regression, respectively)
> press ENTER (assuming you used L1 and L2) (if you wish to use other lists, they must be specified))
Load the equation into the calculator for future use
> press Y=
(> CLEAR out the old equations--if you didn't do this initially)
> press 2nd VARS (for variables), Statistics, EQ, RegEQ (for regression equation)
To see your model graphed on top of the scatterplot
> press GRAPH (2)
To plug in an x-value into your model (3)
> 2nd QUIT (to return to the home screen, if needed)
> press 2nd VARS (for variables), Y-Vars, Y1 (or whichever function you loaded it into), "(#)" where # is a number, ENTER
1. Before entering data, it is good practice to press Y= and CLEAR all existing equations.
2. TRACE works nicely at this point. steps x right and left. switches from the data to the model and back.
3. The other way to plug in an x-value(s) is to use the Table, using TBLSET and TABLE.
Jim Olsen, Western Illinois University