# Load built-in dataset
data(mtcars)

# Create scatter plot
plot(mtcars$hp, mtcars$mpg,
     xlab = "Horsepower (hp)",
     ylab = "Miles per Gallon (mpg)",
     main = "Miles per Gallon vs Horsepower",
     pch = 19)

Interpretation

The scatter plot shows a clear negative relationship between horsepower and miles per gallon. As horsepower increases, fuel efficiency generally decreases, indicating that cars with more powerful engines tend to consume more fuel. The downward trend suggests a fairly strong inverse association between these two variables.