Suppose you collect data for each of the following pairs of variables. You want to make a scatterplot. Identify the response and explanatory variables. What would you expect to see in the scatterplot?...

Suppose you collect data for each of the following pairs of variables. You want to make a scatterplot. Identify the response and explanatory variables. What would you expect to see in the scatterplot? Discuss the direction, curvature, and variation.

(a) Sales receipts: number of items, total cost

(b) Productivity: hours worked, items produced

(c) Football players: weight, time to run 40 yards

(d) Fuel: number of miles since filling up, gallons left in your tank

(e) Investing: number of analysts recommending a stock, its subsequent price change