B. Wage curve shows the relationship between the value of a job and the average pay rate for the job.
Explanation:
Wage curve is the graph to compute the relationship between the value of a job and the average pay rate for the job in question.
The value of a job is computed by the overall demand that the job has from the offers it is getting and the amount of work that is require to be done in a particular sector.
The pay rate in question is the payment that the work receives per hour and how it relates to other sort of work that is assessed.
