5. Which relation is a function?

A. {(–4, –6), (–3, –2), (1, –2), (1, 0)}

B. {(0, 1), (0, 2), (1, 2), (1, 3)}

C. {(–2, –12), (–2, 0), (–2, 4), (–2, 11)}

D. {(8, 1), (4, 1), (0, 1), (–15, 1)}

A. {(-4,-6), (-3,-2), (1,-2), (1,0)}

Step-by-step explanation:

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level