Beginning Algebra With Applications, Chapter 5, 5.1, Section 5.1, Problem 22

The American Council for an Energy-Efficient Economy releases rankings of environmentally friendly and unfriendly cars and trucks sold in the United States. The following table shows the fuel usage, in miles per gallon, in the city and on the highway, for the twelve 2005-model vehicles ranked worst for the environment. Graph the scatter diagram for these data.

$\begin{array}{c|cccccccccccc} \text{Fuel usage, in mpg, city, } x & 9 & 13 & 13 & 12 & 9 & 13 & 14 & 12 & 10 & 13 & 9 & 12 \\ \hline\\ \text{Fuel usage in mpg, highway, } y & 12 & 17 & 17 & 14 & 13 & 17 & 17 & 16 & 14 & 14 & 15 & 16 \end{array}$