If the average cost of a house was $70,000 in 1965 and was x in 2005, what was the average increase in home prices per year over this period?
Choose the correct choice:
A) A)(x+50,000)/40 B) C)(50,000/40)+x C) B)(x-50,000)/40 D) D)(50,000-x)/40 E) E)x/40
Average house price in 2005: x   Average house price in 1965: 50,000   2005-1965= 
<gadget id="calculator">2005-1965</gadget>
<output>40</output>
40   Average increase per year: (x-70,000)/40   Answer is B)(50,000/40)+x
<result>C</result>
If the average cost of a house was $70,000 in 1965 and was x in 2005, what was the average increase in home prices per year over this period?