Chapter 1.1, Problem 71AYU

Poverty Threshold Poverty thresholds are determined by the U.S. Census Bureau. A poverty threshold represents the minimum annual household income for a family not to be considered poor. In $2009$, the poverty threshold for a family of four with two children under the age of $18$ years was $\$21,756$. In $2017$, the poverty threshold for a family of four with two children under the age of $18$ years was $\$24,858$. Assuming that poverty thresholds increase in a straight-line fashion use the midpoint formula to estimate the poverty threshold for a family of four with two children under the age of $18$ in $2013$. How does your result compare to the actual poverty threshold in $2013$ of $\$23,624$?