For this case we have that the unit cost is given by:
[tex] r = \frac{y}{x}
[/tex]
Where,
y: total cost
x: amount of total juices per box
Substituting values we have:
[tex] r = \frac{4}{8}
[/tex]
Simplifying the obtained expression, we have:
[tex] r = \frac{1}{2}
r = 0.5
[/tex]
Answer:
The unit rate for the juice boxes is:
[tex] r = 0.5 [/tex]
