The linear regression analysis between Vehicle Weight (WEIGHT) and Miles per Gallon (MPG) provides the following equation:
MPG=−0.0074×WEIGHT+45.49
This equation indicates that for every additional pound of vehicle weight, the miles per gallon decrease by approximately 0.0074. The intercept of 45.49 suggests that a vehicle with zero weight would theoretically have an MPG of 45.49, which is not practically possible but serves as a baseline for the regression line.
Summary
- Correlation: There is a strong negative correlation (-0.807) between vehicle weight and MPG.
- Regression: The regression line suggests a decrease in MPG with an increase in vehicle weight.
These findings are consistent with the expectation that heavier vehicles tend to be less fuel-efficient.
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