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construct graphs using three related variables

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I need to construct graphs using three related variables:

1. Snowfall (inches)
2. the number of mittens sold per day.
3. Price of each pair of mittens.

Each graph needs show the relationship between two of the variables while holding one constant. I know how to construct the graph and plug in the figures, but I'm having difficulty determining the slope of each graph.

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Solution Summary

Provides a graph and discusses the relationships between the variables provided.

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See attached excel file. I generated some hypothetical data.

1) In this case we say the data Snow Fall and Quantity of mittens sold is positively related. As Snow Fall incraeses so do Mitten sales. We say Quantity and Price are negatively related. In ...

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