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