Answer:
the first one
Step-by-step explanation:
In the other 2 i can see the x repeats itself meaning it isn't a function.
Answer:
horizontal.
Step-by-step explanation:
it goes straight up
Answer:
A, C, D, A, C
Step-by-step explanation:
This is one through five.
C= 50y+20x
Where y is the number of boxes holding 50 pieces each and x is the number of boxes holding 20 pieces each.