At Sunrise Mountain Resort, skiers and snowboarders use a chairlift to get to the top of a hill. The graph shows the relationship between the number of full chairs, c, that arrive at the top of the hill and the total number of people transported, p. Which of the variables is independent and which is dependent?

The dependent variable is always
4 more than
4 less than
4 times
1
4
of
the independent variable.