Question

For which of these pairs of variables might it be possible to draw a straight line on a scatter plot to model the relationship between the variables? Select three that apply.
A.
time and distance

B.
weight and height

C.
age and gender

D.
length and width

Answer 1

A, B, and D.

- Time and distance: can be linear (constant speed).
- Weight and height: often show an approximately linear trend.
- Length and width: often proportional for similar shapes.
- Age and gender: gender is categorical, so you can't model a numeric linear relationship.