Linear Equations and Lines of Best Fit

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

• A

• B

• C

• D

What is the line of best fit?

• y = 5/3x + 375

• y = 1/3x + 475

• y = 5/3x + 3

• y = 1/3x + 375

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

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 equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

In the equation y=3x-5, what is the value of the y-intercept?

• 3

• -5

• -3/5

• -2

Use the line of best fit to approximate rate of change relative to the scatter plot above.

• 7/5

• 5/7

• -7/5

• -5/7