Question: An electronics retailer used regression to find a simple model to predict sales growth in the first quarter of the new year (January through March).

An electronics retailer used regression to find a simple model to predict sales growth in the first quarter of the new year (January through March). The model is good for 90 days, where x is the day. The model can be written as follows:
= 101.32 + 2.48x where is in thousands of dollars.
What would you predict the sales to be on day 90?

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