This is how I would answer these questions:
the high is at around lunch time, and the lows are at the beginning and end of each school day. This makes sense because students are more likely to buy a juice to go with lunch and less likely to need a juice early morning or early evening. At 5:00, the sale is higher than at 3 and 4, probably because students have after-school sports activities at around 5:00 pm.
It doesn't make sense to connect all the dots because they are too scattered. Time and number of cans do not form an visible positive or a negative correlation.
Just for your reference.