Scatterplot Equations Applications

Create a scatterplot from this data. Write the line of best fit for the data.

• y = 5.02x + 1.82

• y = 8x - 15

• y = 1.82x +5.02

• y = -1.82x +5.02

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

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.

• y = 3/2x + 12

• y = 12x + 1.5

• y = 2/3x - 8

• y = -8x + 0.67

• y = 2/3x + 12

Tags

Statistics

Line of Best Fit

What is the trend for this scatter plot

• Negative

• Positive

• None

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

The scatter plot shows number of book chapters and the total number of pages for different books.  Use the line of best fit to predict how many chapters would be in a book with 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

The scatter plot shows number of book chapters and the total number of pages for different books.  Use the line of best fit to predict how many pages would be in a book with 6 chapters.

• 100 pages

• 170 pages

• 60 pages

• 20 pages

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