Wang Xiu Ying is gift wrapping cube-shaped boxes for her class fundraiser. She has modeled the following relationships.
Function Input Output
SSS Side length of box, mmm Surface area of box, S(m)S(m)S, left parenthesis, m, right parenthesis
PPP Surface area of box, aaa Amount of wrapping paper needed, P(a)P(a)P, left parenthesis, a, right parenthesis
RRR Surface area of box, xxx Length of ribbon needed, R(x)R(x)