Suppose you have a Marketing team under your charge, one of the analysts brings you the following information so that you can analyze it and determine if there is any relationship between the variables.

Promotion Sales

10000 25000

15000 23000

20000 21000

25000 30000

**I need the steps to calculate the correlation**

Using Excel and Data Analysis, perform a correlation analysis between the variables and determine whether or not there is indeed any relationship between the two