If x equals 2 what is the value of y iready

Because of your favorite lemonade it is $3.84 for 3 gallons. write this as an unit rate

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Ineed with math stuff it involves graphs