Adelivery truck driver charges a fixed base price of $6 for 2 miles. after 2 miles, he charges an additional $2 for every mile. after 6 miles, he charges an additional $4 for every mile.

describe the cost of the delivery truck between 1 mile and 2 miles.
a.
the cost of the delivery truck between 1 mile and 2 miles is constant.
b.
the cost of the delivery truck between 1 mile and 2 miles is decreasing.
c.
the cost of the delivery truck between 1 mile and 2 miles is increasing.
d.
the cost of the delivery truck between 1 mile and 2 miles cannot be determined from the given information.