Equations of the Line of Best Fit

• $11.38

• For an increase of one hour time worked, what is the predicted increase in the amount of money spent on entertainment?

• $1.81

• What is the predicted amount of money spent on entertainment for a student who works 8 hours?

• $25.86

• What is the predicted amount of money spent on entertainment for a student who doesn't work any hours?

The scatter plot shows the time spent studying, x, and the quiz score, y, for each of 25 students. Using the points (0, 20) and (80, 90), write the equation of the line o best fit. Your slope should be in decimal form. Then predict the quiz score for a student who spent 50 minutes studying.

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170

What is the line of best fit?

• y = 5/3x + 375

• y = 1/3x + 475

• y = 5/3x + 3

• y = 1/3x + 375

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

Which of the following could be the equation of the LINE OF BEST FIT for the data shown here?

• y = 3x – 8

• y = -3x – 8

• y = -3x + 8

• y = 3x + 8

The graph above shows a line of best fit for data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served.  What is the equation of the line of best fit?

• y = (5/3) x + 375

• y = (1/3) x + 475

• y = (5/3) x + 475

• y = (1/3) x + 375

Which equation best represents the data?

•  y = 3/4x + 1

•  y = 4/3x - 1

•  y = -3/4x - 1

•  y = -4/3x - 1

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

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

• y = -25x + 170

• y = 25x + 170

• y = -(5/8) x + 170

• y = (5/8) x + 170