The cubic regression option finds the equation of the form y = ax

The data shown here are the points {(2,11.4), (3,17), (5,27.3), (7,36.1), (11,47.7), (13,49.9)}.

Press to view the statistics calculation options.

Press for regressions, then to select cubic.

Therefore, the best-fit cubic equation for this data is approximately y = -.00698x

Use , , and the menu keys to select

`List1`

for `2Var XList`

,
`List2`

for `2Var YList`

,
and `1`

for `2Var Freq`

.