56+32 use rounding or compatible numbers to estimate the sum

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.

Landon wrote that 3−2.6=4. which statement about his answer is true?

Construct the graph that models the given situation