Tansit company operates commuter trains to help people get to the city ch day Each train travels on a straight route to and from the farthest ation stopping at other stations along the route he graph shows the distance y miles the train is from the station after minutes Distance from the Station miles Commuter Train Distance 30 25 10 5 0 10 20 30 40 50 60 70 80 Time minutes Formula Sheet Calculator Re Type your answer in the box You may use numbers a decimal point and or a negative sign in your answer Based on the graph what was the average speed in miles per minute the train during the interval of 30 to 40 minutes