1. 1.How much longer does it take for object B to travel 40 yards than it takes for object A? 2.How much further has object A traveled in 10 seconds than object B? 3.At what time and distance are object A and object B at the same point? Bell ringer

2. Scatter plots

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

4. Different from a line graph Don’t connect the points Sometimes isn’t clear which IV and which DV

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

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

7. Scatter plots can show: A negative correlation As x increases, y decreases Example: As GPA increases, the hours spent watching TV decrease.

8. Negative correlation can also be strong or weak

9. Scatter plots can show: 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.

10. Line of best fit Shows the trend of the data Can be used to interpolate (find a new point within the data) or extrapolate (find a new point outside the data) Has a specific mathematical formula but roughly the middle of the plotted points Does not have to include 0 May ignore outliers

11. Assignment Make a scatter plot of math scores vs. science scores.