Which statement correctly describes the relation between the variables in the equation C = id: a. C varies directly as d
c. C varies jointly as d
C varies inversely as d
d. C varies directly as x.

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?