Scatter Plots Below is a sample scatter plot, can you tell me what they are designed to show.

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Presentation transcript:

Scatter Plots Below is a sample scatter plot, can you tell me what they are designed to show.

ANSWER Scatter plots are most often used to show correlations or relationships among data.

Common Core #25-28 SCATTER PLOTS, VENN DIAGRAMS, TWO-WAY FREQUENCY TABLES

Scatter Plots Type #1 POSITIVE STRONG or WEAK  As the number of hours that you study increases your overall class grade increases

Scatter Plots – Positive Correlation Study TimeClass Grade Make a prediction for a study time of 5 hours.

Scatter Plot Type #2 NEGATIVE STRONG or WEAK The age of a person and amount of time spent playing video games.

Scatter Plots – Negative Correlation Make a prediction a 5 year old? 80 year old?

Scatter Plots #3 NONE  There is no relationship between the number of shirts someone owns and their annual salary

Scatter Plots – No Correlation Can you make a prediction based on this data?

Line of Best Fit & Outliers A line of best fit is a line that best represents the data on a scatter plot and often shows a trend in the data. Outliers are points too far away from the line of best fit.

NAME THAT SCATTER PLOT WEAK POSITIVE

NAME THAT SCATTER PLOT NONE

NAME THAT SCATTER PLOT STRONG POSITIVE

NAME THAT SCATTER PLOT STRONG NEGATIVE

Practice Problems Pages , 11-12