Mathberry Lane
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Description
Writing Equations for Lines given a point and the slope: y=mx+b Grade 8
This lesson plan includes a conceptual understanding activity with using spaghetti to model linear functions on a graph in order to find the y-intercept. The second part of this lesson, students use the traditional strategy of substituting the values for the slope and an (x,y) coordinate in order to solve for the y-intercept.
A ruler or spaghetti may be used for the modeling part of this lesson.
What's Included?
Pages 1-2 Conceptual Modeling Lesson
Pages 3-4 Traditional Solving for the unknown parameter to write a Linear Equation Lesson
Pages 5-8 Answer Key
Total Pages
8 pages
Answer Key
Included
Teaching Duration
40 minutes
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Standards
to see state-specific standards (only available in the US).
CCSS8.F.B.4
Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of a relationship or from two (𝘹, 𝘺) values, including reading these from a table or from a graph. Interpret the rate of change and initial value of a linear function in terms of the situation it models, and in terms of its graph or a table of values.
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