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Press ENTER to get QuadReg on the HOME SCREEN. In L1 we have
the independent variable and in L2, we have the dependent variable. In
anticipation of graphing the quadratic function of best fit on our scatter
diagram, we can perform the following steps to have the calculator
automatically store the quadratic function of best fit into Y
With QuadReg on the HOME SCREEN, press VARS, scroll right to
highlight Y-VARS, select
1: Function and select 1: Y
After doing this, you should have the
following on your HOME SCREEN:
This means the calculator will find the quadratic function of best fit and
store the function into Y
Press ENTER to enact the program. The following output appears on
your screen.
If you press Y =, you see the equation in Y
(c) To graph the quadratic function of best fit on the scatter diagram is as
simple as pressing GRAPH with the function already stored in Y
.
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