Understanding Scatter Graphs and Correlations

What is the primary purpose of a scatter graph?

• To illustrate changes over time

• To compare the sizes of different categories

• To display the frequency of a single variable

• To show the relationship between two sets of variables

When plotting a scatter graph, which axis should the independent variable be placed on?

• Vertical Y-axis

• Both axes

• Horizontal X-axis

• Diagonal axis

Why is it important to scale units in even multiples when plotting a scatter graph?

• To highlight the dependent variable

• To make the graph look more complex

• To ensure a consistent scale

• To emphasize the independent variable

What does a positive correlation in a scatter graph indicate?

• Both variables increase together

• Both variables decrease together

• There is no relationship between the variables

• One variable increases while the other decreases

Which of the following is an example of a negative correlation?

• As the number of blondes increases, intelligence increases

• As GDP per capita increases, maternal mortality decreases

• As maternal mortality increases, GDP per capita increases

• As GDP per capita increases, life expectancy increases