1. Scatter plots

2. Like a line graph
Has x and y axis
Plot individual points

3. Different from a line graph
Don’t connect the points

4. Scatter plots can show:
1. A positive correlation (relationship) between variables
As x increases
y increases.
Example: As
armspan increases,
height increases.

5. The correlation can be strong or weak
Weak: points further apart
Strong: points close together

6. Scatter plots can show:
2. A negative correlation
As x increases, y decreases
Example: GPA increases as hours spent watching TV decreases.

7. Negative correlation can also be strong or weak

8. Scatter plots can show:
3. No correlation
There is no relationship between x and y.
Example:
The number of hot dogs eaten in a week is not related to the amount of rainfall.

9. Line of best fit Shows the trend of the data
Falls in middle of the plotted points
Does not have to include 0!
May ignore outliers