Question

Janine’s class is selling sandwiches at the school fair.

Which equation represents the relationship between x, the number of sandwiches sold, and y, the total amount earned in dollars?

Responses

x=y+5
x is equal to y plus 5

x=5y
x is equal to 5 y

y=x+5
y is equal to x plus 5

y=5x
y is equal to 5 x

Answer 1

Answer: y = 5x

Reasoning: If 5 stands for the cost of each sandwich, then it’s repeated addition of the sandwiches and their cost, meaning it would have 5 being multiplied by x, hence the 5x part. So, since y stands for the total, it would equal the 5x, because that also describes the total, hence the y = 5x. Hope this makes sense because I’m not very articulate, but I tried my best to use words to explain. :)