Lesson 1 Summary

 

In this lesson you learned how to sketch the graphs of polynomial functions. You learned that

• end behaviour can be determined by the degree and sign of the leading coefficient
• x-intercepts can be determined by looking at the factors of the polynomial
• the graph behaviour at the x-intercepts can be determined by examining the multiplicity of the corresponding factors of the polynomial
• the y-intercept can be determined by substituting zero for x

All functions of degree 3 or higher were shown in both expanded and factored forms. You will learn how to factor these in the next lesson.