The amount restaurant customers tip their servers is shown below. Which of the following conclusions about the amount of money given as a tip and the amount of the bill is best supported by the scatterplot below?
Restaurant Customers' Tips
30
20
Amount of Tip (in dollars)
10
0
20 40 60 80 100 120 140
Amount of Customer's Bill (in dollars)
A There is no relationship between the amount of a customer's bill and the amount given as a tip.
B
The amount given as a tip is unchanged as the amount of a customer's bill increases.
С
The amount given as a tip increases as the amount of a customer's bill increases.
D
The amount given as a tip decreases as the amount of a customer's bill increases.