Scatter Plots Warm UP Workbook Pg 251 Scatter

Scatter Plots Warm UP Workbook Pg. 251

Scatter Plots Scatter plot is a graph with points plotted to show a relationship between two sets of data. Positive Correlation The relationship between paired data when y tends to increase as x increases. Negative Correlation The relationship between paired data when y tends to decrease as x increase. Correlation coefficient A number, denoted by r, from -1 to 1 that measures how well a line fits a set of data pairs (x, y) Best-fitting line The line that lies as close as possible to all the data points.

Scatter Plots Cut out and glue into notes

Scatter Plots Positive correlation: both data sets increase together. No correlation: changes in one data set do not affect the other data set. Negative correlation: as one data set increases, the other decreases.

Scatter Plots The stronger the correlation, the closer to -1 or 1. Strong negative closer to -1. Strong positive closer to 1.

Scatter Plots

Scatter Plots Additional Example 1: Making a Scatter Plot of a Data Set Use the given data to make a scatter plot of the weight and height of each member of a basketball team, and describe the correlation. The points on the scatter plot are (71, 170), (68, 160), (70, 175), (73, 180), and (74, 190). There is a positive correlation between the two data sets.

Scatter Plots

Scatter Plots Use the Scatter Plot and Trend line to make a prediction. Make a prediction. According to the graph, working 10 hours will earn about $24 in tips. Find the point on the line whose x-value is 10. The corresponding yvalue is about 24.

Scatter Plots Check It Out: Example 3 Hours Use the data to predict how many circuit boards a worker will assemble in 10 hours. Hours Worked 14 12 10 8 6 4 2 4 8 6 9 11 Circuit Board 2 7 5 8 12 Assemblies 2 4 6 8 10 12 14 Circuit Board Assemblies According to the graph, a worker will assemble approximately 10 circuit boards in 10 hours.

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