For this page, you’ll need to have the Covid Spread Starter File open on your computer. If you haven’t already, select Save a Copy from the "File" menu to make a copy of the file that’s just for you.
1 Evaluate covid-table and MA-table in the Interactions Area. How are these tables different?
2 Discuss lines 27-34 with your partner. What do you think is going on here?
3 Make a scatter plot from the MA-table, using state as the labels, and day and positive as the x- and y-axis. Sketch the plot below.
4 Use lr-plot to obtain the best-possible linear model for the MA Covid data, graph it on the plot above, and define it below:
y = S =
5 The optimized linear model for this dataset predicts an increase / decrease of about slope y-variable per x-variable.
The error in the model is described by an S-value of about Sunits, which is a poor, ok, good fit considering that y-variable in this dataset range from lowest y-value to highest y-value.
6 Change the definition of the linear function in the Covid Spread Starter File to match the model produced by lr-plot and "Save".
7 Do you think a linear function is a good fit for this dataset? Why or why not?
★ What do you think the code that defines MA-table is actually doing?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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