Final answer:
Each quarter Waunakee Metals expects to sell 20,000 units. Sales prediction for an electronics retailer on day 60 is $250,120, and on day 90 is $324,520 using the regression model provided.
Step-by-step explanation:
The student is asking how many units are expected to be sold in each quarter if Waunakee Metals expects sales for the year to be 100,000 units with quarterly sales of 20,000 units. The answer is 20,000 units for each quarter, which is option 4 in the given choices.
For the exercises regarding car sales, the information provided does not connect directly to the question about the number of units sold by Waunakee Metals. However, to predict the sales for an electronics retailer on day 60 using the regression model ŷ = 101.32 + 2.48x, where x is the day, and ŷ is in thousands of dollars, you would substitute 60 for x to get ŷ = 101.32 + (2.48 * 60), which equals ŷ = 101.32 + 148.8, and ŷ = 250.12. Therefore, the predicted sales on day 60 would be $250,120.
Similarly, for day 90, substitute 90 for x: ŷ = 101.32 + (2.48 * 90), which equals ŷ = 101.32 + 223.2, and ŷ = 324.52. Therefore, the predicted sales on day 90 would be $324,520.