Polynomial End Behavior (What happens when x goes to positive and negative infinity?)

The end behavior of a polynomial tells us the direction a function goes as x approaches positive or negative infinity. Using just the coefficient and highest power of a polynomial we can determine the end behavior.

Some images made using Geogebra.

0:00 Introduction
0:20 End behavior of 6x^4+5x^3-2x^2+x-20
1:48 The four types of polynomial end behaviors
3:14 End behavior of -0.5x^5+5x^2-x+1
4:03 End behavior of 2x^3-x^6+2x^7+2
4:47 Starting with graph and working backwards

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#polynomials
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#precalculus