Equations for Trend Lines

What ordered pairs would you use to find the slope for the trend line?

• (1,0) (6,8)

• (8,6) (0,1)

Given that the slope is  2/3 and the y intercept is -3 what is the equation of the line?

• y = 2/3x - 3

• y = 2/3x + 3

• y = -2/3x - 3

• y = -2/3x + 3

Identify the slope and y intercept to write an equation of the line: y = -1/3x + 1

• Slope: 1/3
  y-intercept: 1

• Slope: 1/3
  y-intercept: -1

• Slope: -1/3
  y-intercept: 1

• Slope: -1/3
  y-intercept: 0

Which of the following could be a possible line of best fit for the data?

• y = -1.5x + 20

• y = -0.5x + 19

• y = x + 20

• y = .7x + 15 

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x

• y = 30x

• y = 30x + 300

• y = (3/2)x + 300

What is the equation of the line of best fit? Read the units carefully on this one!

• y = 750 x + 9500

• y = - 750 x +11000

• y = (3/4) x + 11

• y = - (3/4) x + 11000

Find the slope for the trend line.

• 2

• 1/2

• -2

• -1/2

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

Anthony's math teacher finds that there's roughly a linear relationship between the amount of time students spend on their homework and their weekly quiz scores. This relationship can be represented by the equation y=57+6.3x, where y represents the expected quiz score and x represents hours spent on homework that week. What is the meaning of the x-value when y=99?

• A student's expected quiz score if they spend 1 hour on their homework

• A student's expected quiz score if they spend 99 hours on their homework

• How many hours a student spends studying all year

• The number of hours a student should spend on their homework to expect a score of 99 on the quiz

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6