Please help me on why it can or cannot be non planar with a proof aswell

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?