What is the constant proportionality between 6Y and 4X

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?

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Find the area of an equilateral triangle with a side of 6 inches