Line of Best Fit

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

• Yes

• No

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

• Yes

• No

Which line would be the line of best fit?

• Green line (C)

• Orange line (B)

• Purple line (A)

• None of them

What is the purpose of a line of best fit or a trend line?

• to make predictions

• to make the graph look pretty

• to connect the points

• to make it look like you know what you are doing

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

• Graph A

• Graph B

• Graph C

• Graph D

What would be the equation for the line of best fit?

• y = ³/₄x + 9

• y = -¹/₂x + 9

• y = -³/₄x - 9

• y = -³/₄x + 9

What type of correlation does this graph display?

• positive

• negative

• no correlation

• all of the above

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

Determine the predicted income if 22 hours were worked on an assembly job.

• $207.30

• $449.60

• $691.90

• $543.30

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• 1.409

• .6864