Ill mark brainlist oplss help

Combine the information in the problem and the chart using the average balance method to solve the problem.

Ineed with this problem 21 show steps

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?