The lines graphed below dhow the amounts of water in two tanks as they were being filled over time. for each tank, explain whether or not there is a proportional relationship between the amount of water, in gallons, and the time in minutes. if there is a proportional relationship, identify the unit rate. use specific features of the graph to support your answer.

There is a proportional relationship. You can tell this because the graph is a straight line.

The unit rate for tank A is 666 2/3 gallons per minute. You will determine this by using the rate 1000 gallons in 1.5 minutes. 1000/1.5 = 666.66... or 666 2/3 gallons.

The unit rate for Tank B is 300 gallons per minute. You can determine this by using 600 gallons in 2 minutes. 600/2 = 300 gallons per minute.