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In the United States, the average public school teacher currently earns an annual salary near $55,202. Reported national average salaries for the last six decades are listed below. Year National Average Teachers’ Salary 1960 $4,995 1970 $8,626 1980 $15,970 1990 $31,367 2000 $41,807 2010 $55,202 Determine the average change per year in teachers’ salaries for the last fifty years. $836.78 $1,004.14 $50,207.00 $1,203.94

Respuesta :

carlosego
By definition, the average exchange rate is given by:
 [tex]AVR = \frac{y2 - y1}{x2 - x1} [/tex]
 Substituting values we have:
 [tex]AVR = \frac{55202 - 4995}{2010 - 1960} [/tex] Rewriting we have:
 [tex]AVR = \frac{50207}{50} [/tex]
 [tex]AVR = 1004.14 [/tex]
 Answer:
 the average change per year in teachers' salaries for the last fifty years is:
 [tex]AVR = 1004.14 [/tex]

Answer:

Option B is correct.

Step-by-step explanation:

The salary for the year 1960 = $4995

The salary for the year 2010 = $55202

Number of years between 1960 to 2010 = 2010-1960=50

So, average change will be = Difference in salaries of both years divided by difference in number of years(50)

[tex]\frac{55202-4995}{50}[/tex]

= 1004.14

So, option B is correct.