Some one plzz a. is the relation a function? explain. b. what is the domain of the relation? c. what is the range of the relation? d. what is the value of y when x = 2? explain.

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.