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# Use 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)

There is a slight negative relationship between Miles per Gallon and Horse Power in Cars.