## What if there is no linear relationship between two variables?

If the correlation coefficient of two variables is zero, there is no linear relationship between the variables. However, this is only for a linear relationship. This means that there is no correlation, or relationship, between the two variables.

## What type of correlation which there is no relationship between two variable?

A zero correlation indicates that there is no relationship between the variables. A correlation of –1 indicates a perfect negative correlation, meaning that as one variable goes up, the other goes down.

**When there is no linear correlation between two variables What will the value of R be?**

The value of r can range from 0.0, indicating no relationship between the two variables, to positive or negative 1.0, indicating a strong linear relationship between the two variables.

**How do you determine if there is a linear relationship between two variables?**

The linear relationship between two variables is positive when both increase together; in other words, as values of get larger values of get larger. This is also known as a direct relationship. The linear relationship between two variables is negative when one increases as the other decreases.

### What is a positive linear?

The slope of a line describes a lot about the linear relationship between two variables. If the slope is positive, then there is a positive linear relationship, i.e., as one increases, the other increases. If the slope is 0, then as one increases, the other remains constant.

### What does it mean when a correlation exists between two variables?

A correlation exists between two variables when the values of one are somehow associated with the values of the other in some way. It is positive if both variables increase or decrease together (study time & grades). It is negative if, when one variable increases, the other decreases (party time and grades!).

**What is an example of a linear relationship?**

Linear relationships such as y = 2 and y = x all graph out as straight lines. When graphing y = 2, you get a line going horizontally at the 2 mark on the y-axis. When graphing y = x, you get a diagonal line crossing the origin.

**Is there evidence of a linear relationship?**

Conclusion: “There is sufficient evidence to conclude that there is a significant linear relationship between x and y because the correlation coefficient is significantly different from zero.”

## How do you confirm causation?

To determine causality, Variation in the variable presumed to influence the difference in another variable(s) must be detected, and then the variations from the other variable(s) must be calculated (s).