Scatter Plots and Lines of Fit

Which graph shows a line of best fit for the scatter plot?

• Graph A

• Graph B

• Graph C

• Graph D

Determine whether each graph shows a positive correlation, a negative correlation, or no correlation.

• positive correlation

• no correlation.

• negative correlation

Use (1997, 13) and (2005, 22) to find the slope.

• 8/9

• 9/8

• 9

• 8

Graph has a slope of 1/2 and a y- intercept of 1.  Write the equation in slope - intercept form

• y = 1x+1/2

• y = 1/2x + 1

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

Match the following vocabulary words with their definitions.

• Scatter Plot

• The line that best represents data on a scatter plot.

• Line of Best Fit

• When x increases, y decreases.

• Positive Correlation

• a cluster of data that shows a relationship between two numerical variables

• Negative Correlation

• When x increases, y increases

• No Correlation

• No trend.

  Scattered data does not show a relationship.

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

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