In 2000, 31% of U.S. adults viewed a college education as essential for success. For- the period 2000 through 2010, the percentage viewing a college education as essential or success increased on average by approximately 2.4 each year. If this trend continues, by which year will 67% of all American adults view a college education as essential for success? Solution (67-55)/2.4 12 / 2.4 = 5 Therefore it will occur 5 years after 2010. Answer: 2015.