The percentage of families that were married couples with

Last updated: 7/17/2022

The percentage of families that were married couples with children between 1970 and 2000 is approximately where t is measured in decades, with t = 1 corresponding to 1970. (a) What percentage of families were married couples with children in 1980? (Round your answers to one decimal place.) (b) How fast was the percentage of families that were married couples with children changing in 1980? (Round your answers to