Find the domain and range.
- {(7,2),(7,-7),(7,-5)}
A) Domain: {2,7} ; range: {-7,-5}
B) Domain: {-7,-5,2} ; range: {7}
C) Domain: {7} ; range: {-7,-5,2,7}
D) Domain: {7} ; range: {-7,-5,2}

Question

Find the domain and range.
- {(7,2),(7,-7),(7,-5)} 
A) Domain:  {2,7} ;  range:  {-7,-5} 
B) Domain:  {-7,-5,2} ; range:  {7} 
C) Domain:  {7} ;  range:  {-7,-5,2,7} 
D) Domain:  {7} ;  range:  {-7,-5,2}

Quizplus · Accepted Answer

The domain of a set of ordered pairs is the set of all first elements, and the range is the set of all second elements. Here, all first elements are 7, so the domain is {7}. The second elements are 2, -7, and -5, making the range {-7, -5, 2}.

Find the Domain and Range