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9-12 Extra Support Materials for Algebra 1 Unit 5 Lesson 9

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Extra Support Materials for Algebra 1

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Lesson 9

9.1 Warm-up 9.2 Activity 9.3 Activity

Unit 5, Lesson 9

Increasing and Decreasing Functions

Extra Support Materials for Algebra 1

9.1

Warm-up

For each pair of numbers, write , or in the blank to make a true equation or inequality. Be prepared to share your reasoning.

-6 -9
Let .

9.2

Activity

Describe and with a situation that could fit the given graphs. Explain your reasoning.

9.3

Activity

Draw an example of a graph that shows two functions as they are described. Make sure to label the functions.

The population of 2 cities as functions of time so that city A always has more people than city B.
The population of 2 towns as functions of time so that town A is larger to start, but then town B gets larger than town A.
The population of 2 villages as functions of time so that village A has a steady population and village B has a population that is initially large, but decreases.

None