Find the domain and range.

Find the domain and range.
R={( -4, -7), ( 12, 5), ( 11, -9), ( 11, -3)}


Solution:

The domain of a relation is the set of all first coordinates so we can write Dom R={-4, 12, 11}

The range of a relation is the set of all second coordinates so we can write Ran R={-7, 5, -9, -3}