Pre-Algebra Examples

$8 x^{3} - y = 0$

Step 1

Find the point at $x = - 2$ .

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Step 1.1

Replace the variable $x$ with $- 2$ in the expression.

$f (- 2) = 8 {(- 2)}^{3}$

Step 1.2

Simplify the result.

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Step 1.2.1

Raise $- 2$ to the power of $3$ .

$f (- 2) = 8 \cdot - 8$

Step 1.2.2

Multiply $8$ by $- 8$ .

$f (- 2) = - 64$

Step 1.2.3

The final answer is $- 64$ .

$- 64$

Step 1.3

Convert $- 64$ to decimal.

$y = - 64$

Step 2

Find the point at $x = - 1$ .

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Step 2.1

Replace the variable $x$ with $- 1$ in the expression.

$f (- 1) = 8 {(- 1)}^{3}$

Step 2.2

Simplify the result.

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Step 2.2.1

Raise $- 1$ to the power of $3$ .

$f (- 1) = 8 \cdot - 1$

Step 2.2.2

Multiply $8$ by $- 1$ .

$f (- 1) = - 8$

Step 2.2.3

The final answer is $- 8$ .

$- 8$

Step 2.3

Convert $- 8$ to decimal.

$y = - 8$

Step 3

Find the point at $x = 0$ .

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Step 3.1

Replace the variable $x$ with $0$ in the expression.

$f (0) = 8 {(0)}^{3}$

Step 3.2

Simplify the result.

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Step 3.2.1

Raising $0$ to any positive power yields $0$ .

$f (0) = 8 \cdot 0$

Step 3.2.2

Multiply $8$ by $0$ .

$f (0) = 0$

Step 3.2.3

The final answer is $0$ .

$0$

Step 3.3

Convert $0$ to decimal.

$y = 0$

Step 4

Find the point at $x = 1$ .

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Step 4.1

Replace the variable $x$ with $1$ in the expression.

$f (1) = 8 {(1)}^{3}$

Step 4.2

Simplify the result.

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Step 4.2.1

One to any power is one.

$f (1) = 8 \cdot 1$

Step 4.2.2

Multiply $8$ by $1$ .

$f (1) = 8$

Step 4.2.3

The final answer is $8$ .

$8$

Step 4.3

Convert $8$ to decimal.

$y = 8$

Step 5

Find the point at $x = 2$ .

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Step 5.1

Replace the variable $x$ with $2$ in the expression.

$f (2) = 8 {(2)}^{3}$

Step 5.2

Simplify the result.

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Step 5.2.1

Raise $2$ to the power of $3$ .

$f (2) = 8 \cdot 8$

Step 5.2.2

Multiply $8$ by $8$ .

$f (2) = 64$

Step 5.2.3

The final answer is $64$ .

$64$

Step 5.3

Convert $64$ to decimal.

$y = 64$

Step 6

The cubic function can be graphed using the function behavior and the points.

$\begin{array}{c} x & y \\ - 2 & - 64 \\ - 1 & - 8 \\ 0 & 0 \\ 1 & 8 \\ 2 & 64 \end{array}$

Step 7

The cubic function can be graphed using the function behavior and the selected points.

Falls to the left and rises to the right

$\begin{array}{c} x & y \\ - 2 & - 64 \\ - 1 & - 8 \\ 0 & 0 \\ 1 & 8 \\ 2 & 64 \end{array}$

Step 8