Over the years, it was noticed that the cost of a slice of pizza and the cost of a subway fare in a certain city seemed to increase by the same amounts. let x represent the cost of a slice of pizza and let y represent the corresponding subway fare. use the following statistics that were obtained from a random sample of costs (in dollars) of pizza/subway fares to construct a prediction interval estimate of the subway fare with 95% confidence when the cost of a slice of pizza is $1.20.