Line of Best Fit Quiz

Find the line of best fit that matches the scatter plot.

Round your "m" and "b" values to the nearest hundredth place.

Answer explanation

To find the line of best fit, enter your table of values into Desmos and then use the equation that is on the board.

Round m and b to the nearest hundredth.

Your answer should be very similar to this:

y=6.03x+7.07

Strong or Weak? _______________

• Strong
• Weak

Negative or Positive? _______________

• Positive
• Negative

Which of the following does this relationship represent?

• Association only

• Causation only

• Both association and causation

• Neither association nor causation

Answer explanation

The relationship indicates a correlation between two variables, but does not imply that one causes the other. Therefore, it represents 'Association only', as causation cannot be established without further evidence.

Use the line of best fit to predict how many laws will be mowed if a person works for 10 days.

Round to the nearest whole number.

Answer explanation

To predict the number of laws mowed in 10 days, use the line of best fit from the graph. Find the corresponding value for 10 days on the x-axis, then round to the nearest whole number for the final prediction.

Which of the following does this relationship represent?

• association only

• causation only

• both association and causation

• neither association or causation

Answer explanation

The relationship indicates a correlation between two variables, which is an association. However, it does not imply that one variable causes the other, hence the correct choice is 'association only'.

Explain how you know: __________________________________________