Module # 8 Correlation Analysis and ggplot2

 library(ggplot2)


# use built-in dataset

data(mtcars)


# scatter plot with regression line

ggplot(mtcars, aes(x = hp, y = mpg)) +

  geom_point(color = "steelblue", size = 3) +

  stat_smooth(method = "lm", se = FALSE, color = "black") +

  labs(

    title = "Relationship Between Horsepower and Fuel Efficiency",

    x = "Horsepower",

    y = "Miles Per Gallon"

  ) +

  theme_minimal()

I used the built-in mtcars dataset in R to explore the relationship between horsepower and miles per gallon using a scatter plot with a regression line. The visualization shows a clear negative relationship, meaning cars with higher horsepower tend to have lower fuel efficiency. Using a simple layout with clear labels and minimal colors follows Few’s design recommendations by making the relationship between variables easy to interpret.

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