Find the how long it has been raining based upon the amount of rainfall. Scholars analyze a table of the amount of rainfall as a function of time. Pupils first determine whether the function is invertible, then they find and interpret function and function inverse values from the table.

Concepts

rainfall, math modeling, function tables, functions, inverse functions, function notation

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Additional Tags

math

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Instructional Ideas

• Use the task along with a discussion to introduce inverses

Classroom Considerations

• The class should understand what it means to have an invertible function
• Individuals should understand function notation and the notation for inverse functions

Pros

• Provides an explanation along with the solutions
• Points out that it might be beneficial to have a discussion about how rainfall is measured

Cons

• None

Common Core

HSF-BF.B.4.c