A study on driving speed (miles per hour) and fuel efficiency (miles per gallon) for midsize automobiles resulted in the following data. Driving Speed 50 30 50 40 25 30 55 60 25 55 Fuel Efficiency 25 32 28 25 37 30 25 23 37 23 (a) Construct a scatter diagram with driving speed on the horizontal axis and fuel efficiency on the vertical axis. 10 40 35 40 35 35 30 25 8 : Fuel Efficiency (MPG) Fuel Efficiency (MPG) 20 Fuel Efficiency (MPG) 15 10 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 O Driving Speed (MPH) Driving Speed (MPH) Driving Speed (MPH) Fuel Efficiency (MPG) 10 20 30 40 50 60 70 O Driving Speed (MPH) (b) Comment on any apparent relationship between these two variables. For midsized cars, lower driving speeds seem to yield higher miles per gallon. For midsized cars, all driving speeds seem to yield about the same miles per gallon. For midsized cars, lower driving speeds seem to yield lower miles per gallon. For midsized cars, there seems to be no relationship between driving speeds and fuel efficiency