Linear Models to Make Predictions

• y= 8/7x+1
• y= 7/8x+1
• y= -7/8 +1
• y= -8/7+1

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

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

• 2

• 1/2

• -2

• -1/2

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

• Graph A

• Graph B

• Graph C

• Graph D

• 28

• 28.5

• .5

• 56.5

• 64

• 74

• 72

• 95

Clare owns a mobile pet grooming company. She charges $20 to come to your home plus $30 per hour to groom your pet. Which equation models the amount she charges over time?

Using a linear model, which is the best prediction for the amount of sunny days if there were 10 rainy days?

• A

• B

• C

• D

Using a linear model, which is the best prediction for the amount of sunny days if there were 10 rainy days?

• A

• B

• C

• D

A scatter plot was created to show the length of a person's vacation and the weight of the suitcase they packed. The equation of the trend line is y=5x+15, where x represents the length of the trip.

Use the equation to predict the weight of a suitcase for someone taking a 9-day trip.

• 45

• 60

• 15

• 55