# 8th Grade Math : Data

## Example Questions

### Example Question #1 : 8th Grade Math

The scatter plot provided displays a group of students' test scores versus the number of missing assignments the students have. Based on plot, select the best answer that describes the direction of the points.

A negative, non linear association

A positive, linear association

A positive, nonlinear association

A negative, linear association

A negative, linear association

Explanation:

The data points in the scatter plot move up the y-axis as the x-axis decreases; thus the data points show a negative association. Also, the data points do not curve, or go up and down, but gradually decreased; thus the scatter plot shows a linear association. We could even draw a "best fit" line:

### Example Question #2 : 8th Grade Math

A teacher at a high school conducted a survey of seniors and found that  students owned a laptop and  of those students also had a car. There were  students that did not have a laptop, but owned a car. Last, they found that  students did not own a laptop nor a car. Given this information, how many students had a laptop, but did not own a car?