Answer:
We know
[tex]y=3.5x[/tex] represents the cost of [tex]x[/tex] pounds of raisins.
Also, cranberries costs $18 per 4 pounds.
So, to graph these proportions, we have to find the equation for cranberries, if 4 pounds costs $18, that means 1 pound of cranberries is $4.50, this is the ratio of change of cranberries, using this ratio, we can say that the relation is
[tex]y=4.5x[/tex]
If you compare, cranberries are more expensive than raisins, the image attached shows both proportion graphed.
Therefore, raisins represent the lower unit price, $3.50 per pound, while cranberries represent the higher unit price, $4.50 per pound.