Line of Best Fit Word Problems

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 pages would be in a book with 19 chapters. 

• 150 pages

• 170 pages

• 190 pages

• 210 pages

A person travels by car. They record their miles driven in a data table. Calculate the linear regression equation of this data.

• y = 61.93x - 1.79

• y = -1.79x + 61.93

• y = 0.016x + 0.03

• y = 0.03x + 0.016

The height a toy rocket is above the ground is recorded for several times after it was launched. Approximately the line of best fit.

• y = 0.5x +96.9

• y = -0.5x + 96.9

• y = 96.9x + 0.5

• y = -96.9x - 0.5

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 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

• y = 1.45x + 22
• y = -2x + 15
• y = 1.33x + 30
• y = -1.5x + 24

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

• y = 4.19 + 163.41x

• y = 4.19 - 163.41x

• y =163.41 - 4.19x

• y = -163.41+ 4.19x
  

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours

How much does the package weigh?

• 0 lbs

• 1 lb

• 2 lbs

• 6 lbs

Yvonne and her friends held a bake sale to benefit a shelter for homeless people. The friends sold 22 cakes on the first day and 15 cakes on the second day of the bake sale. They collected $88 on the first day and $60 on the second day. Let x represent the number of cakes sold and y represent the amount of money made. Find the slope of the line that would pass through the points given.

• m = 1/4

• m = -4

• m = 4

• m = -1/4