The accompanying table gives the cost and an overall quality rating for 15 different brands of bike helmets (www.consumerreports.org).
a. Construct a scatterplot using y = quality rating and x = 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?