## Reflection: Rigor Sketching Polynomial Functions - Section 4: Closure

As you can see from the attached student work, some students did not take this exit ticket far enough.  Most students were able to easily identify the zeros of the function.  However, many students had the graph sketched incorrectly because they did not consider (or incorrectly considered) the leading coefficient test.  This is a concept we will have to revisit in a future lesson to ensure students understand that both concepts (zeros and the leading coefficient test) are needed to make an accurate sketch of a cubic function.

Rigor: Not There Yet

# Sketching Polynomial Functions

Lesson 17 of 21

## Big Idea: Both the leading coefficient test and the roots can give students a fairly accurate idea for the shape of a polynomial function.

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Standards:
Subject(s):
Math, Algebra, Polynomial Roots, polynomial functions, Graphing (Algebra), Quadratic Equations, leading coefficient, zeros, Sketch, cubic functions
40 minutes

### James Bialasik

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