emily and andy each go to a hardware store to buy wire. The table shows the cost y in dollars for x inches of the wire they need. emily needs 21 feet of the wire. andy needs 13 yards of the wire. How much will each of them spend for​ wire?

Hi! So Emily will spend $15.12. Andy will spend $9.36. When you divide y by x you get a constant. Which in this case is how much a inch of wire costs which is $0.06. Then since you are given Emily and Andy’s lengths in feet you need to convert to inches. Which give you 252” for Emily and 156” for Andy. You then multiply each those lengths by the constant, and you get your answers. Hope this helps some!