Chapter 12, Problem 32P

Use the following information to answer the next two exercises. 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:

   $\hat{y}\text{=1}0\text{1}.\text{32}+\text{2}.\text{48}x$where y is in thousands of dollars.

What would you predict the sales to be on day 90?