15.8. Modeling with Regression http://www.ck12.org
The linear relationship describes the upward positive relationship in the data very well, but some points are slightly
off of the line. The cubic relationship is much more accurate at the specific data points; however, there are features
of the cubic relationship that differ significantly from reality when interpreted in context. In order to choose the best
regression model you need to use context clues and the reasonableness of the various features of the model that fit
each situation.
Vocabulary
Theresidualis the difference between the actual height and the predicted height using the model.
Guided Practice
- The following data represents the height of an elephant over time. Determine the best regression function to use
and determine its equation.