Question

Find out the correlation that exists between the following scatter plot, which depicts the number of cars after different hours of time.

• A. Positive Correlation
• B. Negative Correlation
• C. Zero Correlation

Answer 1

The correct option is C Zero Correlation

If the dependent variable decreases with the increase in independent variable, then the scatter plot will exhibit negative correlation. It is represented as follows,



On the contrary, if dependent variable increases with the increase in the independent variable, then the scatter plot will represent positive correlation. This can be depicted as follows,



And if no clear relationship is visible between the two variables, then there will be no or zero correlation. It can be represented as follows:



Observe the given scatter plot.


Here, time is an independent variable and thus plotted on $x$-axis and number of cars passed the highway is a dependent variable and hence plotted on $y$-axis.

Clearly, there is no visible relationship between the two variables as the number of cars passing the highway increases and decreases with the passage of time.

Hence, zero correction exists between the time and the number of cars passed the highway.

So, option (c) is correct.