Math Scatterplots

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

• Graph A

• Graph B

• Graph C

• Graph D

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

As x increases, y decreases.

• no correlation

• negative correlation

• correlation coefficient

• positive correlation

If Gold's Gym is looking to buy 30 TVs, how much will each one cost?

• 400

• 750

• 1250

• 0

Find the slope for the trend line using points (2,2) and (4,3)

• 2

• 1/2

• -2

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

• Yes

• No

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

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

The correlation coefficient is a number "r" such that: 

• -1<r<1

• -1>r>1

• -1≤r≤1

• -1≥r≤1