Why Use Scatter Plots?

A scatter plot is ideal for:

• Visualizing relationships between two numerical variables;

• Detecting patterns, clusters, or outliers;

• Exploring correlation (positive/negative/none).

Basic Syntax for Scatter Plots in ggplot2

ggplot(data = df, aes(x = variable_x, y = variable_y)) +
  geom_point()

To add group-based color, use: aes(x, y, color = group_var)

Example: Selling Price vs Kilometers Driven

ggplot(df, aes(x = km_driven, y = selling_price)) + 
  geom_point() + 
  labs(title = "Scatter Plot of Selling Price vs. Kilometers Driven",
       x = "Kilometers Driven", 
       y = "Selling Price")

This shows how a car’s usage relates to its price — often revealing depreciation trends.