The horizontal axis is time studying in hours. Vertical axis is scores on the test. And each of these blue dots represent the time and the score for a given student. So this student right over here spent, I don't know, it looks like they spent about.6 hours studying, and they didn't do too well on the exam. They look like they got below a 45, looks like a 43 or 44 on the exam. This student over here spent almost 4 1 1 1 studying and got, looks like a 94, close to a 95 on the exam. And what Sheera did is try to draw a line that tries to fit this data.