# 10.8: Problem Solving Strategies: Choose a Function Model

**At Grade**Created by: CK-12

## Learning Objectives

At the end of this lesson, students will be able to:

- Read and understand given problem situations.
- Develop and use the strategy:
*Choose a Function Model.* - Develop and use the strategy:
*Make a Model*. - Plan and compare alternative approaches to solving problems.
- Solve real-world problems using selected strategies as part of a plan.

## Vocabulary

Terms introduced in this lesson:

- logistic regression

## Teaching Strategies and Tips

The lesson presents several mathematical models arising from real-world applications in the examples.

Encourage students to read and understand the modeling process presented as a flow chart in the introduction.

In each of the examples, present and compare several regressions side-by-side. Allow students to see how accurate each is.

## Error Troubleshooting

General Tip: Students rush to calculate the regression not stopping to consider its appropriateness. A scatter plot should always be consulted first.

General Tip: Have students check the data points they have entered into a calculator twice.

General Tip: On the TI graphing calculators, students should be using *LinReg*\begin{align*}(ax+b)\end{align*}*LinReg*\begin{align*}(a+bx)\end{align*}*LnReg*.

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