- Light It Up- In this cooperative learning activity, students are presented with a real-world problem: Given a mirror and laser pointer, determine the position where one should stand so that a reflected light image will hit a designated target. This investigation allows students to develop several rational functions that models three specific forms of a rational function. Students explore the relationship between the graph, the equation, and problem context.

TitleLight It Up URLhttp://illuminations.nctm.org/LessonDetail.aspx?id=L606 Materials neededLight It Up Activity Sheet

Laser Pointer (or Flashlight)

Tape Measures

Tape

Wooden Block (at least 10 cm thick, or a thick book)

Graphing Calculator

Small, Flat Mirror

Carousel Cards

Markers

Overhead Projector

Blank Paper

Timer

ScissorsLearning ObjectivesStudents will:

- State the domain, range and end behavior of rational functions.
- Write rational functions that model problem situations
- Use rational functions to solve problems
Grade LevelsAlgebra I, Mathematical Analysis CA 97 StandardsAlgebra I: 13.0 Students add, subtract, multiply, and divide rational expressions and functions. Students solve both computationally and conceptually challenging problems by using these techniques Mathematical Analysis 6.0: Students find the roots and poles of a rational function and can graph the function and locate its asymptotes. CA Common Core State Standards Standards for Mathematical Practice:

1. Make sense of problems and persevere in solving them

2. Reason abstractly and quantitatively

3. Construct viable arguments and critique the reasoning of others

4. Model with mathematics

5. Use appropriate tools strategically

6. Attend to precision

7. Look for and make use of structure

8. Look for and express regularity in repeated reasoningAlgebra-APR 1. Understand that polynomials form a system analogous to the integers, namely, they are closed under the operations of addition, subtraction, and multiplication; add, subtract, and multiply polynomials, and divide polynomials by monomials. Solve problems in and out of context. Functions-IF.7d; Graph rational functions, identifying zeros and asymptotes

when suitable factorizations are available, and showing end behavior.How could you use this resource?Students can use this resource in a lab to discover how rational functions are used in the real world as well as practice graphing data and drawing conclusions from data. Teachers can use this resource as a lab or a lesson as an introduction to rational functions.

EL and Special NeedsDoes not use vocabulary in a way that makes the lesson hard to follow. Uses manipulatives to get the students involved and to physically see what is going on and where the data is coming from.

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