Posted by Norma on Sunday, January 9, 2011 at 7:29pm.
in 1992, the life expectancy of males in a certain country was 67.5 years. In 1997, it was 69.9 years. let E represent the life expectancy in years t and let t represent the number os years since 1992. The linear function E(t) that fits the data is

algebra  Damon, Sunday, January 9, 2011 at 7:37pm
slope = m = (69.9  67.5) / (9792)
e = m t + 67.5 
algebra  bobpursley, Sunday, January 9, 2011 at 7:38pm
slope is (69.967.5)/5
E= slope*t+67.5 
algebra  Norma, Sunday, January 9, 2011 at 7:51pm
thank you