1.44 A Hong Kong snack-food vendor offers 3 types of boxed ”lunches to go,” priced at $3, $5, and $10, respectively. The vendor would like to establish whether there is a relationship between the price of the boxed lunch and the number of sales achieved per hour. Consequently, over a 15-day period the vendor records the number of sales made for each of the 3 types of boxed lunches. The following data show the boxed-lunch price (x) and the number sold

(y) during each of the 15 lunch hours.

13, 72 15, 52 110, 22 13, 92 15, 62 110, 52 13, 62 15, 62 110, 12 13, 102 15, 72 110, 42 13, 52 15, 62 110, 42 Prepare a scatter plot of the points and comment on the relationship between the price of the boxed lunches and the numbers sold each lunchtime.