Which types of variables are required to create a scatter plot?

• A. One qualitative and one quantitative variable
• B. One quantitative variable only
• C. $2$ quantitative variables
• D. $2$ qualitative variables

Answer: (C)

Verified step by step guidance

1. Understand that a scatter plot is a graphical representation used to observe the relationship between two variables.
2. Recall that scatter plots require both variables to be numerical (quantitative) so that each point can be plotted on an x-y coordinate system.
3. Recognize that qualitative (categorical) variables cannot be directly plotted on a scatter plot because they do not have a meaningful numeric scale.
4. Therefore, to create a scatter plot, you need two quantitative variables, where one variable is plotted on the x-axis and the other on the y-axis.
5. Conclude that the correct choice is 'Two quantitative variables' because this allows visualization of how one numeric variable changes with respect to another.