1. Correlation Coefficient Before doing this on the calculator, the class should do a scatter graph using the data in the table. Discuss the relationship between the data (i.e. gms of fat v calories). Total Fat (g)Total Calories Hamburger9260 Cheeseburger13320 Quarter Pounder21420 Quarter Pounder with Cheese 30530 Big Mac31560 Special31550 Special with Bacon34590 Crispy Chicken25500 Fish Fillet28560 Grilled Chicken20440 Grilled Chicken Light5300 Project Maths Development Team © 2008

2. Correlation Coefficient by Calculator This will show the table on the right on the screen. Now input all the data items into the X and Y columns. Press after each data item. When all the data items are inputted, press the following: This will give a correlatrion coefficient of 0.9746 Compare this answer with your interpretation of the scatter graph. Using the Casio fx-83ES Project Maths Development Team © 2008

3. Line of Best Fit by Calculator Using the Casio fx-83ES Project Maths Development Team © 2008 The data is already inputted to the calculator using the previous steps. If the correlation coefficient is still on your calculator, scroll up to it using the button and delete it using the button. Then for the value of A And for the value of B (NB Delete the value of A before calculating the value of B) Line of Best Fit is y = A + Bx