Question

Where should I look to find at least 3 variables that I believe have a linear relationship?

Answer 1

Example of linear relationship:

1. Height and weight of a person.

There is positive correlation between height and weight, because if height increases weight also increases.

2. Volume and pressure.

There is negative correlation between volume and pressure. Because if pressure increases volume decreases.

3. Income and expenditure.

Positive correlation. Because  income increases expenditure also increases.

4. Temperature and ice creame sold.

Positive correlation. If temperature increases ice creame sale also increases.