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Lesson 3-8: Using Equations to Model Data

Lesson 3-8: Using Equations to Model Data. Objective Students will: write equations for lines from data points Use equations to extrapolate other data values. Writing Equations from data: Find 2 data points Get slope Use point-slope form (Plug in slope & 1 ordered pair) Solve for y.

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Lesson 3-8: Using Equations to Model Data

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  1. Lesson 3-8: Using Equations to Model Data Objective Students will: write equations for lines from data points Use equations to extrapolate other data values

  2. Writing Equations from data: • Find 2 data points • Get slope • Use point-slope form (Plug in slope & 1 ordered pair) • Solve for y Extrapolating: Getting an extra point Given an x (or y value) Plug it into your equation Solve for y (or x)

  3. Example 1: At 6°C, A cricket chirps 11 times per minute. At 20°C, A cricket chirps 109 times. How: Write an equation to model chirps per degree Celsius Which is input-x? Which is output-y? Write two ordered pairs (temp,chirp) then solve from yesterday! Temp Chirps

  4. ExtendUse your formula • Find the number of chirps if the temp is 18 • If a cricket chirps 109 times, what is the temp?

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