Upload
chad-obrien
View
216
Download
2
Embed Size (px)
Citation preview
Using the Graphing Calculator to Create a Scatter Plot and Line of
Best FitUnit 5, Lesson 11
Mrs. King
Assume that during a three-hour period spent outside, a person recorded the temperature and their water consumption. The experiment was conducted on 7 randomly selected days during the summer. The data is shown in the table below. Create a scatterplot for the data. What is the correlation?
Line of Best Fit or a trend line is a straight line on a Scatter plot that comes closest to all of the points on the graph.
A Line of Best Fit may pass through some of the points, none of the points or all of the points.
Definition:
Sandwich Total Fat (g)
Total Calories
Hamburger 9 260
Cheeseburger 13 320
Quarter Pounder 21 420
Quarter Pounder with Cheese 30 530
Big Mac 31 560
Arch Sandwich Special 31 550
Arch Special with Bacon 34 590
Crispy Chicken 25 500
Fish Fillet 28 560
Grilled Chicken 20 440
Grilled Chicken Light 5 300
Example: Is there a relationship between the fat grams and the total calories in fast food?
1. Enter the data in the calculator lists.
2. Prepare a scatter plot of the data.
Line of Best Fit on Calculator
The graph will look like this.
3. Have the calculator determine the line of best fit. Press STAT → CALC #4 LinReg(ax+b) Press ENTER
y = 11.73x + 193.85