Line of Best Fit

Write an equation for the given trend line

• y= 0.4x

• y= 2.5x

• y= -0.4x

• y= -2.5x

Write an equation for the trend line

• y= 0.5x

• y= 2x

• y= -0.5x

• y= -2x

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

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

• Graph A

• Graph B

• Graph C

• Graph D

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

What are the coordinates of the outlier?

• (3,4)

• (4,3)

• (3,10)

What is the y intercept for this line of best fit?

• 10

• 5

• B

A line drawn on a scatter plot that is close to most of the data points.

• Best fitting line

• Best Linear Line

• Line of best fit

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