pls hep there are 5 pics do all the problems if you do not know the answer do not answer just move on will give big brain boi trophy

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.