Scatterplot and Slope

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

As x increases, y decreases.

• no correlation

• negative correlation

• correlation coefficient

• positive correlation

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

• Yes

• No

Find the slope for the trend line using points (2,2) and (4,3)
Use m= (Y2-Y1)/(X2-X1)

• 2

• 1/2

• -2

• -1/2

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

Which best describes the form of this scatterplot?

• linear

• nonlinear

• scattered

Which sentence describes the relationship shown on this scatterplot?

• 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

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 chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours