Please help me with this I will give brainliest. Find the value of x. Round to the nearest tenth

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Whats the name of the vertical axis

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?