Answer the following questions
1.latitude is measured north and south from the a) prime meridian b) equator c) international date line.
2.longitude is measured east and west from the a) prime meridian b) equator
c) international date line.
3. the line of latitude that is 0 degrees latitude is the a) prime meridian b) equator
c) international date line.

1) Latitude measures the north-south location of a place: the reference point is b) the equator!

2) Longitude's reference point is the  a) Prime Meridian

ps.  International Date Line is not really a straight line, as it's adjusted for political boundaries!

3) this is almost the same question as the first one: the lines of reference have 0 degrees. so it's the Equator!