Agroup of 40 children attend a baseball game. each child received either a hotdog or a bag of popcorn. hotdogs were $2.25 and popcorn was $1.75. if the total bill was $83.50, how many hotdogs and bags of popcorn were purchased

Step-by-step explanation:

Had all received popcorn, the bill would have been 40×$1.75 = $70. The bill was $13.50 more than that. Each hot dog purchased in place of popcorn adds $0.50 to the bill, so the number of hot dogs must be ...

  $13.50/$0.50 = 27

Of course, the remainder of the 40 items were popcorn, so 13 bags of popcorn.

27 hot dogs and 13 bags of popcorn were purchased.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value