Linear Word Problems and Line of Best Fit

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

What type of correlation does this scatter plot show?

• positive 
• negative
• no correlation
• nonlinear association

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• Weak Positive

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam? 

• 65
• 92
• 70
• 76

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

• 25 hours
• 35 hours
• 45 hours
• 15 hours

What type of association does this graph show?

• Positive
• negative
• none
• all of the above

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

Which line of best fit equation corresponds to the values in this table?

• y = 4x - 2

• y = 2x - 4

• y =-2.65x - 4.18

• y = -4.18x - 2.65

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