1. A large warehouse superstore is interested in optimizing its customers' shopping experiences and, as such, wants to ensure that it is able to staff the store properly during peak hours. The store management is interested in studying the relationship between the number of tills or checkouts that are open in the store and the amount of time it takes for a customer to check out (that is, the time it takes from when they get in line to when they complete their purchase). The data in the following table were collected from a random sample of 7 customers:

Tills Open Time to Checkout (minutes)

(x) (y)

2 17

9 10

12 5

5 12

3 15

10 8

6 12

(4 marks)

a.Construct a scatter diagram for these data with "Tills Open" on the horizontal (x) axis, and "Time to Checkout" on the vertical (y) axis. Note: Try to make relatively full use of the graph paper.