Lesson on Scatter Plots

Lesson on Scatter Plots

Positive Correlation

As x increases, y increases. Looking at this graph...the older you are, the more money you will make.

Types of Positive Correlation

Strong Positive or Weak Positive

Negative Correlaton

As x increases, y decreases. Example...when I run(exercise) 2 km/wk my weight is about 88 kg. (2, 88) When I run(exercise) 5 km/wk my weight is about 84.5 (5, 84.5)

No Correlation

When the two inputs have no correlation, no effect on each other, it is said to have no correlation. There is no relationship between the two sets of input.

Types of Negative Correlations

Strong, Weak , and Perfect

Multiple Choice

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

Multiple Choice

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

• 65

• 92

• 70

• 76

Multiple Choice

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many pages would be in a book with 19 chapters.

• 150 pages

• 170 pages

• 190 pages

• 210 pages

Multiple Choice

What type of correlation does this scatter plot show?

• positive

• negative

• no correlation

• nonlinear association

Multiple Choice

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

Multiple Choice

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 12 absences should get approximately what score on the final exam?

• 60

• 92

• 70

• 76

Multiple Choice

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

Multiple Choice

What type of correlation does this graph have?

• Negative

• no association

• positive