Equations of Trend Lines

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 6 chapters. 

• ≅100 pages
• ≅170 pages
• ≅60 pages
• ≅20 pages

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

• A
• B
• C
• D

• 440 turtles
• 40 turtles
• 150 turtles
• 90 turtles

• y= -5/8x+6
• y= 5/8x+6
• y=-8/5x+6
• y= 8/5x+6

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

• y= 8/1x+6
• y= -1/2x+6
• y= -2x+6
• y= 1/2x+6

• y= 1/2x+8
• y= -1/2x+8
• y= 1/4x+8
• y= -1/4+8

• graph 1
• graph 2
• graph 3
• graph 4

the slope is -5/7, what does that mean?

• gain 5 hour of sleep for 7 cups of coffee
• lose 5 hours of sleep for 7 cups of coffee
• lose 7 cups of coffee for 5 hours of sleep
• lose 5 cups of coffee for 7 hours of sleep

Which describes the scatterplot?

• As speed increases distance decreases.
• As speed increases, distance increases.
• As speed decreases distance increases.