Greta is a crime scene investigator. She found a footprint at the site of a recent murder and believes the footprint belongs to the culprit. To help identify possible suspects, she is investigating the relationship between a person's height and the length of his or her footprint.
She consulted her agency's database and found cases in which detectives had recorded the length of people's footprints, x, and their heights (in centimeters), y.
