Welcome to algebra 2
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Welcome to Algebra 2!. Get out your homework Get out catalogs Get out writing utensils Put bags on the floor Be quiet!!!. Curve Fitting with Linear Models. Section 2-7. Definitions. Regression is the statistical study of the relationship between sets of data

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Welcome to Algebra 2!

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Welcome to algebra 2

Welcome to Algebra 2!

  • Get out your homework

  • Get out catalogs

  • Get out writing utensils

  • Put bags on the floor

  • Be quiet!!!

2-7: Curve Fitting with Linear Models


Curve fitting with linear models

Curve Fitting with Linear Models

Section 2-7

2-7: Curve Fitting with Linear Models


Definitions

Definitions

  • Regression is the statistical study of the relationship between sets of data

  • Scatterplot is a graph that helps understand the form, direction, and strength of the relation; individual points

  • Correlation is the strength and direction of the linear relationship between two variables

  • Correlation Coefficient is the measure of how well the data set is fit by through a model; represented by r

  • -1 ≤ r ≤ 1

  • Line of Best Fit is the line that best approximates a set of data

2-7: Curve Fitting with Linear Models


Steps of curve fitting

Steps of Curve Fitting

  • Identify and list all of the data points

  • Put data into calculator – use STAT key

  • STAT  CALC  and select LinReg (ax + b) to get the equation

2-7: Curve Fitting with Linear Models


Example 1

Example 1

The table shows the U.S. daily oil production y (in thousands of barrels x years) after 1994.

  • Use the graphing calculator to find and graph the equation of the best-fitting line.

  • Use the equation from part (a) to predict the daily oil production in 2009.

2-7: Curve Fitting with Linear Models


Your turn

Your Turn

Use the graphing calculator to find and graph the equation of the best-fitting line.

2-7: Curve Fitting with Linear Models


Assignment a2 2

Assignment A2-2

  • P. 146: #1, 3, 5 + 9, 10, 11

2-7: Curve Fitting with Linear Models


Assignment a2 4 a2 6

Assignment A2-4 A2-6

  • P. 146: #1, 3, 5

2-7: Curve Fitting with Linear Models


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