The amount of money susan earns varies directly with the number of hours she works. susan earned $180 and worked for 12 hours. if x = the number of hours susan worked, and y = the amount she earns. which equation models susan's direct variation?

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?