3.41 ● The accompanying table gives the cost and an overall quality rating for 15 different brands of bike helmets (www.consumerreports.org).

Cost Rating 35 65 20 61 30 60 40 55 50 54 23 47 30 47 18 43 40 42 28 41 20 40 25 32 30 63 30 63 40 53

a. Construct a scatterplot using y 5 quality rating and x 5 cost.

b. Based on the scatterplot from Part (a), does there appear to be a relationship between cost and quality rating? Does the scatterplot support the statement that the more expensive bike helmets tended to receive higher quality ratings?