What number goes in the blank?? NEED HELP ASAPPP

Write the expression as a single natural logarithm. 2 in a - 4 in y

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

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?