Car correlations What factor most explains differences in Fuel Efficiency among cars? Below is a correlation matrix exploring that relationship for the car’s Weight, Horsepower, engine size...

Car correlations What factor most explains differences in Fuel Efficiency among cars? Below is a correlation matrix exploring that relationship for the car’s Weight, Horsepower, engine size (Displacement), and number of Cylinders.

a) Which factor seems most strongly associated with Fuel Efficiency?

 b) What does the negative correlation indicate?

c) Explain the meaning of R2 for that relationship.