ࡱ> '` xVbjbj{P{P i:: ,AAAA,A ,olBBBBBDDDkkkkkkk$%mhorkQED"DEEkBB)lHHHEBBkHEkHH6.dfBB T}hAF:ef?l0ol*e`oFo8fofdD"DHDEDDDkkHDDDolEEEE,,,",,,",,, Name:_________________ Linear Regression Practice Assignment:_______ Directions: Answer each question and round answers to the hundredths place. Linear Regression Model: This is often known as the line of best fit which is a line used to model a set of data. A line of fit shows the general direction of the data and has about the same number of data points above and below it. xy17341849389040962970.51641.51133 Example: Find the linear regression model using your calculator of the data. Step 1: Enter the data into the L1 and L2 in your calculator. Step 2: Graph the scatterplot. Make sure your StatPlots are turned on. Change the window if necessary. Step 3: Calculate the linear regression model (shown to the right) stat!calc!8 ! L1 ! , ! L2 ! , ! VARS !Y-VARS ! enter ! enter ! enter  Step 4: Record the linear regression model. y = Step 5: Press graph and view the linear regression line on your scatterplot The following data represents the amount of money Sergio has in his bank account. Week123456789Money Left21019819017515514212811095 Graph the scatterplot on your calculator. Put the weeks into L1 and the Money Left into L2. Record the window you used in the table. XminXmaxXsclYminYmaxYscl Find the Linear Regression model and graph your model stat!calc!8 ! L1 ! , ! L2 ! , ! VARS !Y-VARS ! enter ! enter ! enter y = ____________________ Based on the equation for the linear regression line, what is your slope and y-intercept? Slope: ____________ y-intercept: _______________ What is the real-world meaning of the slope? What is the real-world meaning of the y-intercept? Use the equation to calculate when Sergio will be out of money. The following table represents the number of calories and grams of fat certain food items contain. Grams of Fat668881014161618Calories100110150300190170470300310450 XminXmaxXsclYminYmaxYsclGraph the data on a scatterplot and describe the window you used in the table. Find the Linear Regression model y = ____________________ Based on the equation for the linear regression line, what is your slope and y-intercept? Slope: ____________ y-intercept: ___________ What is the real-world meaning of the slope? What is the real-world meaning of the y-intercept? Does this make sense? According to the model, approximately how many grams of fat (x) are in a burger that has 334 calories? Show your work. Year19921993199419951996199719981999Jobs4.54.54.85.05.05.76.16.3 The 6JKLY     7 8 > ? 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