What does 40x+22-2 equal? please help ASAP

Whats the name of the vertical axis

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost