1. A scatter plot is a graph that shows the relationship between two variables.
2. The points in a scatter plot often show a pattern, or trend.
3. From the pattern or trend you can describe the correlation.
Example:
Julie gathered information about her age and height from the markings on the wall in her house.
| Age (years) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|-------------|---|---|---|---|---|---|---|---|
| Height (cm) | 70 | 82 | 93 | 98 | 106 | 118 | 127 | 135 |
a) Label the vertical axis.
- The vertical axis should be labeled "Height (cm)".
b) Describe the trend in the data.
- The trend in the data is that as age increases, height also increases.
c) Describe the relationship.
- The relationship between age and height is positive and linear, indicating that as age increases, height increases at a relatively constant rate.
Parent Tip: Review the logic above to help your child master the concept of lines of best fit worksheet answers.
