The PDF linked below challenges a student to demonstrate understanding of the relationship between two sets of data. A student must make sense of two sets of data displayed in two different scatter plots. A student must make sense of the table and look for trends including correlations and lines of best fit. A student must make inferences based upon the data and draw conclusions about a situation being modeled.
http://www.insidemathematics.org/common-core-math-tasks/high-school/HS-S-2003%20Snakes.pdf