Find the estimated life expectancy for an individual born in 1950 and one born in 1982?

Why aren't the answers the same as the values in the table that correspond to those years?

Use the two points in to plot the least squares line on a graph

Year of birth Life Expectancy

1930 59.7

1940 62.9

1950 70.2

1965 69.7

1973 71.4

1982 74.5

1987 75

1992 75.7

2010 78.7