Four friends used the same taxi service to meet at a restaurant for dinner.
When they arrived at the restaurant, they compared their cab fare and tried to figure out a rule that the taxi company used to calculate cost.
Denise's trip was only 1 mile and her total cost was $4.50.
Mark said that his trip was 6 miles, and his total cost was $12.00
•Solange's trip was 3 miles, and her total cost was $7.50
Kate's trip was 8 miles, and her total cost was $15.00.