F(x) = 2/3 x -5 what is the value f(6)?

What is a graph with a never ending line called?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

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?