CK12 Calculus - Single Variable

Sinceour calculatorwill also allowfor a varietyof non-linearfunctionsto be usedas models,we can therefore
examinequitea few real life situations.We will first consideran exampleof quadraticmodeling.
QuadraticModels
Example2:
The followingtablelists the numberof FoodStamprecipients(in millions)for eachyearafter1990.
(Source:http://www.fns.usda.gov/pd/fssummar.htm.)

yearsafter 1990 Participants

1 22.6

2 25.4

3 27.0

4 27.5

5 26.6

6 2.55

7 22.5

8 19.8

9 18.2

10 17.2

We enterthe data in our calculatorinL3andL4(that enablesus to savethe last example’s data).We then
will view a scatterplot. Changethe windowrangesaccordinglyto includeall of the data.Use for
and for
Hereis the scatterplot:

Now let us computethe regressionequation.Sinceour scatterplot suggestsa quadraticmodelfor the data,
we will chooseQuadraticRegressionfrom the menu.We get the equation: