Scatter Plot and Line of Best Fit

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

Q1. What is the trend observed in the data?

• A) positive trend

• B) negative trend

• C) no trend

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours

Write the equation of the trend line in slope-intercept form.

Write an equation of the trend line in slope-intercept form.

Write an equation of the trend line in slope-intercept form.

If the debate team plans to practice for 6 hours, how many debates should they win?

• 20

• 16

• 24

• 28

How do I determine the y-intercept of the trend line from a graph?

• look where the line crosses the y-axis

• use the slope formula

• positive trend
• negative trend
• no trend

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

• A

• B

• C

• D