Another activity that you can do is to find the line of best fit for a data set. You can use the same interactive webpage as before to find the line of best fit. Is there a relationship between the fat grams and the total calories in fast food?

Sandwich Total Fat (g) Total Calories
Hamburger18260
Cheeseburger40 320
Quarter Pounder56 420
Quarter Pounder with Cheese70 530
Big Mac31560
Arch Sandwich Special31550
Arch Special with Bacon34590
Crispy Chicken25500
Fish Fillet28560
Grilled Chicken20440
Grilled Chicken Light5300

Go to the website used earlier in the resource.

This activity might not be viewable on your mobile device.For this interactive activity, assistance may be required. Regression Activity

  1. A sample graph is shown below.
  2. Put the points from the sandwich table into the graph.
  3. Select Move Fit Line.
  4. Check the Fit your own line box.
  5. Move the green points until you think you have the line of best fit. (The green line shown below is not close enough.)
  6. Once you think you have the line of best fit, check the Display line of best fit box.
example of moving the fit line

Source: http://www.shodor.org/interactivate/

Using your notes and your green and red equations, predict the number of calories would be in a sandwich that contains 40 grams of fat. Then discuss why the answers are different.