Is Horsepower of a Car Related to Its Mileage?
Motor Trend magazine collected the horsepower and mileage for 32 cars in the 1973-74 model year. To see if there is any relationship between horsepower and mileage, I construct a scatterplot of the these two variables, Horsepower and Mileage.
From the Graph,we can see that Mileage decreases as the Horsepower increases. The Mileage and Horsepower have a negative relationship, though not a linear negative relationship. It can be seen clearly that Mileage drop tremendously when the Horsepower increase from 50hp to 150hp.When the Horsepower stays at 180hp, the Mileage seems range from 15mpg to 20mpg. However, there are extreme values of Mileage at 10mpg when the Horsepower ranges from 200hp to 220hp. After the Horsepower goes beyond 250hp, the Mileage increases to 15mpg and stays around 15mpg as the Horsepower increases up to more than 300hp.
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