Which of the following sets represents the domain of the function shown?
{(2, 7}, (15, 13), (21, –4), (24, 18)}
a) {-4,2,7,13,15,18,21,24}
b) {7,, ,,24)
c) {2,15,21,24}
d) {-4,7,13,18}

The domain of the function is the x-values and the range is y - values.
The function is { ( 2, 7 ) , ( 15, 13 ), ( 21, - 4 ), ( 24, 18 ) }
The domain is:
C ) { 2, 15, 21, 24 }
( the range is D ) )