Finding Equations of Line of Best Fit

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170

The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57

• f(x) = 5.57x + 25.05

• f(x) = -5.57x + 25.05

• f(x) = 5.57x - 25.05

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

• A

• B

• C

• D

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

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

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

The graph below shows the value of a computer given the age of the computer. Which equation would best fit the data?

• y = -250x + 2000

• y = 250x + 2000

• y = -250x - 2000

• y = 2000x -250

Is this line an accurate line estimate of best fit for the data?

• Yes

• No