In Example 6, a spreadsheet was used to create a scatter plot by entering the probability and latitude of each location. The latitude of a location on Earth is the angular distance of that location north or south of the Equator. The latitude is usually measured in degrees. (The symbol for degrees is °.) The latitude of the equator is 0°. The latitude of the North Pole is 90° north, which can be written as 90° N. The latitude of the South Pole is 90° south, which can be written as 90° S. These latitudes are shown in the figure below. The locations in Example 6 are north of the Equator. So, the latitudes on the scatter plot in the solution are 30° N, 35° N, 40° N, 45° N (shown in the figure below), and 50° N.

The national weather service is one way to learn about weather alerts and your local forecast, but you might also consider checking out weather.com. Weather.com offers much more than a simple weather forecast. You can see forecasts for skin dryness, hair frizziness, aches and pains, pollen count, and numerous other topics that are affected by the weather.

Sample answer:

Other possible factors include the city's altitude, average temperature on December 25, whether the city lies in a lake effect snowbelt, and the landscape of the area the city is in.