The median age for a first marriage in the United States for women was 25.9 in 2009 and 26.1 in 2010. Use an exponential model to predict the median age for women in 2019, where x is the number of years since 2009.

the ratio of growth is 26.1/25.9 = 261/259

in x years the median age = 25.9 * (261/259)^x

in 2019 (after 10 years) = 25.9 * (261/259)^10 = 27.97