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? (2 points)
24
30
48
72
22. [3.05] Which relation does not represent a function? (2 points)
(-8, 4), (-3, 2), (1, 3), (5, -8)
(2, 0), (4, 6), (7, 6), (8, 5)
(-4, 6), (-1, 1), (0, 4), (4, 7)
(1, 2), (2, 5), (5, 7), (1, 3)

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?  (2 points)
24
30
48
72
22.   [3.05] Which relation does not represent a function?  (2 points)
(-8, 4), (-3, 2), (1, 3), (5, -8)
(2, 0), (4, 6), (7, 6), (8, 5)
(-4, 6), (-1, 1), (0, 4), (4, 7)
(1, 2), (2, 5), (5, 7), (1, 3)

btaylor · Answer

domain=x values, so difference is 152-128=24
(1, 2), (2, 5), (5, 7), (1, 3) is not a function because there are two y-values for x=1

anonymous · Answer

omg thank you your alife saver lolz :)