Tips Listed below are amounts of bills for dinner and the amounts of the tips that were left. The data were collected by students of the author. Is there sufficient evidence to conclude that there is...

Tips Listed below are amounts of bills for dinner and the amounts of the tips that were left. The data were collected by students of the author. Is there sufficient evidence to conclude that there is a linear correlation between the bill amounts and the tip amounts? If everyone were to tip with the same percentage, what should be the value of r?

Extracted text: 107.34 Bill (dollars) Tip (dollars) 33.46 50.68 98.84 63.60 12.00 87.92 5.50 5.00 17.00 16.00 8.08