As sally is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours driving it has 3.5 gallons of gas left in it 4. what is the average rate of change?

As sally is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours driving it has 3.5 gallons of gas left in it 4. what is the average rate of change?

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