F-BF.1b

[Elizabeth]

I’d appreciate some help with applications of F-BF.1b (Combine standard function types using arithmetic operations) beyond the example of adding a constant function to an exponential function. Should students in Math 2 or Algebra 2 combine quadratic functions with other functions to model real-world situations?

[lhwalker]

There are lots of great task examples here: http://www.illustrativemathematics.org/HSF-BF.A.1

Explanations for F.BF standards begin on page 11 of the High School Functions progressions:

Click to access ccss_progression_functions_2012_12_04.pdf

[Elizabeth]

My questions is specifically about part b: Combine standard function types using arithmetic operations.

This is a modeling standard, and the only task directed at it is a non-modeling task, “A Sum of Functions”. There aren’t any tasks (yet 🙂 specifically aligned to part b, and the Functions Progression also cites the example of an exponential function combined with a constant function. I’d love some other examples. Thanks!

[Bill McCallum]

We’ll try and work on some for Illustrative Mathematics!

[Author]

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