Question

1. why are maps
2. give the following for both latitude and longitude.

a. the name of the reference, or 0° line
b. the range of possible values, including directions

Explanation:

For latitude, the 0° line is the Equator. Its values range from 0° at the Equator to 90°N at the North Pole and 90°S at the South Pole. For longitude, the 0° line is the Prime Meridian. Its values range from 0° at the Prime Meridian to 180°E and 180°W.

Answer:

a.
Latitude: Equator; Longitude: Prime Meridian
b.
Latitude: 0° - 90°N and 0° - 90°S; Longitude: 0° - 180°E and 0° - 180°W