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Multiple Choice

Which graphic best represents the relationship between ages and incomes of employees?

When you want to understand how two numeric variables relate, a scatter plot is the best choice. It plots each employee as a point with age on the horizontal axis and income on the vertical axis, so you can visually assess patterns like whether income tends to rise with age, whether there’s a plateau, or if there’s no clear relationship. It also helps you spot outliers and any nonlinear trends. An area plot stacks values over a continuous dimension and emphasizes totals over time, not the direct relationship between two numeric measures. A bar chart is ideal for comparing categories or group means, but it doesn’t show the precise relationship between age and income across individuals. A pie chart shows parts of a whole and is not suited for two numeric variables.

When you want to understand how two numeric variables relate, a scatter plot is the best choice. It plots each employee as a point with age on the horizontal axis and income on the vertical axis, so you can visually assess patterns like whether income tends to rise with age, whether there’s a plateau, or if there’s no clear relationship. It also helps you spot outliers and any nonlinear trends.

An area plot stacks values over a continuous dimension and emphasizes totals over time, not the direct relationship between two numeric measures. A bar chart is ideal for comparing categories or group means, but it doesn’t show the precise relationship between age and income across individuals. A pie chart shows parts of a whole and is not suited for two numeric variables.