Scatter Plots and Predictions

Find the equation of the line of best fit for the given data

• y=163.41x + 4.19

• y=-163.41x + 4.19

• y=-4.19x + 163.41

• y= 4.19x - 163.41

• There is no linear correlation of the data set

Tags

Statistics

Line of Best Fit

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

Tags

Statistics

Scatter Plots

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 type of correlation does this scatter plot show?

• positive linear association

• negative linear association

• no association

• exponential association

• quadratic association

Tags

Statistics

Scatter Plots

In this image, how would you describe the point that does not fit the pattern of the other dots?

• The point is a linear model.

• The point is an outlier.

• The point is the range.

• The point is the median.

• The point is the vertex.

Tags

Statistics

Scatter Plots

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours

• 30 hours

Tags

Statistics

Scatter Plots

Estimate the correlation coefficient

• r= -0.9

• r= 0.9

• r=-0.5

• r=0.5

• r= 0.1

Tags

Statistics

Scatter Plots

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

Tags

8.5.D

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

• A

• B

• C

• D

Tags

8.5.D

The scatterplot represents the heights and weights of a group of people.

Based on the trend line, what would be the weight of a person who is 72 inches tall?

• About 180 lbs

• About 163 lbs

• About 153 lbs

• About 145 lbs

Tags

8.5.D