The picture to the right is an explanation of terms you will need to know for this lesson. The latitude is measured in degrees North of the equator. The equator would be 0 and the North Pole is 90. Longitude is measured in degrees West of the prime meridian. In this case, the prime meridian is measured as 0 and numbers increase East to West up to 180. For example, Chicago, IL is 42 degrees latitude (or North of the equator) and is 88 degrees longitude or ( West of the prime meridian.)
To help answer the questions above, we can use a statistical term called covariance. In this lesson, you will learn the ideas behind covariance and how to calculate it. Before we start this temperature problem, let's use GSP to investigate the concept of covariance.