SAT Mathematics Practice Test 4

The exact coordinates of the scatterplot in the xy-plane cannot be read from the bar graph provided. However, for a data point to be above the line y = x, the value of y must be greater than the value of x. That is, the consumption in 2010 must be greater than the consumption in 2000. This occurs for 3 types of energy sources shown in the bar graph: biofuels, geothermal, and wind.
Choices A, B, and D are incorrect and may be the result of a conceptual errorin presenting the data shown in a scatterplot. For example, choice B is incorrect because there are 2 data points in the scatterplot that lie below the line y=x.