Homework SourseHow does the fuel consumption of a car change as its speed i
How does the fuel consumption of a car change as its speed increases? Here are data for a British Ford Escort. Speed is measured in kilometers per hour, and fuel consumption is measured in liters of gasoline used per 100 kilometers traveled:
Look at the scatterplot of the data. What is the explanatory variable?
Fuel or Speed?
| Speed | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 | 140 |
| Fuel | 20.7 | 12.8 | 9.6 | 7.9 | 7.4 | 6.3 | 6.2 | 6.5 | 7.7 | 7.9 | 8.7 | 9.7 | 11.2 | 11.6 |
Solution
Explanatory variable is speed. Fuel is the dependent variable.
Scatter plot would look like this
It seems relationship is apparently not linear.
