The set of ordered pairs below defines a relation. In each ordered pair (x, y), x represents the daily wages of a mechanic, and y represents the daily wages of his assistant.

{(128, 80), (152, 110), (152, 95), (128, 80), (128, 95)}

What is the difference between the values of the least and greatest elements in the domain of this relation?

Question

The set of ordered pairs below defines a relation. In each ordered pair (x, y), x represents the daily wages of a mechanic, and y represents the daily wages of his assistant. 

{(128, 80), (152, 110), (152, 95), (128, 80), (128, 95)} 

What is the difference between the values of the least and greatest elements in the domain of this relation?

anonymous · Answer

the domain is the x values.
the y values are part of the range
it's just testing your knowledge of the words DOMAIN, GREATEST & LEAST
once you have that, it's just a subtraction job.