Find the missing side​

100 points, hi, i’m not sure how to get the equation from the graph and table.

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5