21. Linear Regression (with captions)
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The regression features of the calculator allow us <BR>to find functions that are good fits for the data
In this case it looks like a linear function will be a <BR>fairly good fit for the data.
To do that, let's go to STAT, Calculate
linear regression which is option 4
of list 1 because the data is in list 1;
list 2 comma
and I would like for it to actually graph the <BR>function, so to do that I'm going to go to VARS <BR>which is variables
arrow to Y variables
function
and I'm going to choose Y1
ENTER
The calculator has determined
that Y equals
2 and 3/10 X
plus -9/10
is a good fit for the data and it has pasted that <BR>into Y1
So, let's graph that.
And we see that it's not a perfect fit but it's a <BR>close fit.