This page focuses on the modern-table of the Hybrid CO2 Models Starter File, which tracks atmospheric CO2 (parts per million) from 2010-2023.
Decomposing Your Periodic Model
Towards the bottom of the Definitions Area, find the section of the starter file where you’re asked to "Define your periodic-sin functions…"
1 Define periodic-sin to be the periodic model you found earlier, for CO2 levels from 2022-2023.
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You should already have defined it in Carbon Dioxide Starter File.
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You can also look at Modeling Recent Carbon Dioxide Levels (continued), the workbook page from the previous lesson.
2 Using the deconstruction of periodic-cos as your model, change the other three functions in this section to show how to separate the wave and midline of your periodic-sin model and define periodic-sin2 using function composition.
Fitting the Optimal Linear Model
3 Use fun linear-modern(x): ( * x) + end
4 Change the The S-value is:
5 Sketch the model on the graph to the right. |
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Fitting your Periodic Model
6 Use The S-value is:
7 Sketch the model on the graph to the right. What would need to change about your model, to fit this data?
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Imagining the Best Possible Model
8 Sketch the best possible model you can imagine for this data on the graph to the right, and describe it. Do parts of it look linear? Quadratic? Exponential? Logarithmic? Periodic? |
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These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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