During the past 5 years there has been an inflationary trend. Listed below is the average cost of a gallon of milk for each year.

1981	1982	1983	1984	1985
$1.10	$1.23	$1.30	$1.50	$1.65

Assuming a linear relationship exists, and that the relationship continues unchanged through 1986, what would you predict for the average cost of a gallon of milk in 1986?