(Solved): The percentage of a country's population 25 years and older with at least a high school diploma is ...

The percentage of a country's population 25 years and older with at least a high school diploma is shown in the table for selected years. Let $x=0$ represent $1950,x=10$ represent 1960 , and so on. (a) Use the data for 1950 and 2000 to find a linear function $f$ that models the data. (b) Use the function from part (a) to approximate the percentage of the country's population 25 years and older who were at least high school graduates in 1995. (a) A linear function that models the data is $f(x)=$ (Simplify your answer. Use integers or decimals for any numbers in the expression.)