Pre-Algebra Examples

$y = 4 x + 1$

Substitute $- 2$ for $x$ and find the result for $y$ .

$y = 4 (- 2) + 1$

Simplify the right side.

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Multiply $4$ by $- 2$ .

$y = - 8 + 1$

Add $- 8$ and $1$ .

$y = - 7$

Substitute $- 1$ for $x$ and find the result for $y$ .

$y = 4 (- 1) + 1$

Simplify the right side.

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Multiply $4$ by $- 1$ .

$y = - 4 + 1$

Add $- 4$ and $1$ .

$y = - 3$

Substitute $0$ for $x$ and find the result for $y$ .

$y = 4 (0) + 1$

Simplify the right side.

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Multiply $4$ by $0$ .

$y = 0 + 1$

Add $0$ and $1$ .

$y = 1$

Substitute $1$ for $x$ and find the result for $y$ .

$y = 4 (1) + 1$

Simplify the right side.

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Multiply $4$ by $1$ .

$y = 4 + 1$

Add $4$ and $1$ .

$y = 5$

Substitute $2$ for $x$ and find the result for $y$ .

$y = 4 (2) + 1$

Simplify the right side.

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Multiply $4$ by $2$ .

$y = 8 + 1$

Add $8$ and $1$ .

$y = 9$

This is a table of possible values to use when graphing the equation.

$\begin{array}{c} x & y \\ - 2 & - 7 \\ - 1 & - 3 \\ 0 & 1 \\ 1 & 5 \\ 2 & 9 \end{array}$

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