1. 4-5 Predicting with Linear Models
Goals:
Use a linear model to make predictions.
Eligible Content:
A / A / A / A / A / A / A

2. What can we do once we have an equation???
We can use the equation to predict what will happen in the future.
Predictions assume that the trend continues indefinitely.
Remember: It is just a prediction – an estimate!!

3. Vocabulary Linear Interpolation Linear Extrapolation
Estimating the coordinates of a point that lies between two given data points.
Predicting within the data.
Linear Extrapolation
Estimating the coordinates of a point that lies to the left or right of the given data points.
Predicting outside the data.

4. The Linear Model for the data is y = 2237x + 32,720.
x is the number of years since 1995.
Use this equation to estimate the amount of money spent on advertising in the following years:
a. 1996
b. 2008
c. 1990
d. 2000

5. Making a Scatter Plot
Height
(inches)
Weight (pounds) 72
190 70
170 71
180
175 69
160
150 73 66 76
200
The table shows the height and weight of each member of a soccer team.
Make a scatter plot. Put height on the horizontal axis and weight on the vertical axis.
Find the equation of the line of best fit.

6. Use your Equation To answer questions.
Estimate the weight of a player who is 70 inches tall.
Estimate the height of a player who weighs 185 pounds.
Estimate the weight of a player who is 74 inches tall.
Estimate the height of a player who weighs 165 pounds.

7. Practice Page 252 #11 Draw the scatterplot
Find the equation of the line of best fit
Use your equation to predict the interval after a 7.5 minute eruption.

8. Homework Page 251 #8-10 complete all parts of each question!!!
#10 should have a scatterplot