Whats the slope form?

Based on what i know about mean, this doesn't add up.

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

Someone answer asap for ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?