How to calculate the area of a cylinder

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined