## Reflection: Adjustments to Practice Comparing Rates of Growth - Section 4: Investigation II & Closing

I ended up closing this lesson by asking students to predict how many years it would take Computafest to catch up Calcu-rama in terms of net profit.  In hindsight, I wish I had asked students to write down their predictions rather than state them out loud.  I find that sometimes there is one student who is perceived as having the right answer and today when his guess was very high, most of the other students kept their guesses high as well. I think in order to get a more authentic response and prediction from students I should have asked them to privately write down their thoughts. I think this would have given me a better sense of how students were understanding the growth patterns in this problem.  I did like ending the class with this prediction though because I think it leaves us at a great starting point for the next lesson.

Making Student Predictions Private
Adjustments to Practice: Making Student Predictions Private

# Comparing Rates of Growth

Unit 7: Functions
Lesson 8 of 11

## Big Idea: Which company will make more profit? Students compare and contrast a linear growth model and an exponential growth model. They work with a variety of representations to determine when the two companies will have the same amount of money.

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Standards:
Subject(s):
Math, exponential growth, Algebra, Exponential growth functions, linear growth patterns, Algebra 1, function, Modeling Functions, explicit equations, recursive equations, function
60 minutes

### Amanda Hathaway

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