5. Katherine uses AABC, where DE | AC to prove that a line parallel to one side of a triangle divides the other two sides proportionally. A part of her proof is shown

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.