Find the End Behavior y=1/3x^3-2x^2

$y = \frac{1}{3} x^{3} - 2 x^{2}$

Step 1

Combine $\frac{1}{3}$ and $x^{3}$ .

$y = \frac{x^{3}}{3} - 2 x^{2}$

Step 2

Identify the degree of the function.

Identify the exponents on the variables in each term, and add them together to find the degree of each term.

$\frac{x^{3}}{3} \to 3$

$- 2 x^{2} \to 2$

The largest exponent is the degree of the polynomial.

$3$

Step 3

Since the degree is odd, the ends of the function will point in the opposite directions.

Odd

Step 4

Identify the leading coefficient.

The leading term in a polynomial is the term with the highest degree.

$\frac{x^{3}}{3}$

The leading coefficient in a polynomial is the coefficient of the leading term.

$\frac{1}{3}$

Step 5

Since the leading coefficient is positive, the graph rises to the right.

Positive

Step 6

Use the degree of the function, as well as the sign of the leading coefficient to determine the behavior.

1. Even and Positive: Rises to the left and rises to the right.

2. Even and Negative: Falls to the left and falls to the right.

3. Odd and Positive: Falls to the left and rises to the right.

4. Odd and Negative: Rises to the left and falls to the right

Step 7

Determine the behavior.

Falls to the left and rises to the right

Step 8