C
Step-by-step explanation:
Graph it and you will see it is a function and since you are adding them it is also a relation. Good luck.
y=mx+
9 sandwiches per hour
step-by-step explanation:
when we have a rate, we want a 1 in the denominator
27/3 = 9
27 sandwiches/ 3 hours = 9 sandwiches/hour