Precalculus Examples

$y = x + 1$

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

$y = (- 2) + 1$

Solve the equation for $y$ .

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Remove parentheses.

$y = - 2 + 1$

Remove parentheses.

$y = (- 2) + 1$

Add $- 2$ and $1$ .

$y = - 1$

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

$y = (- 1) + 1$

Solve the equation for $y$ .

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Remove parentheses.

$y = - 1 + 1$

Remove parentheses.

$y = (- 1) + 1$

Add $- 1$ and $1$ .

$y = 0$

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

$y = (0) + 1$

Solve the equation for $y$ .

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Remove parentheses.

$y = 0 + 1$

Remove parentheses.

$y = (0) + 1$

Add $0$ and $1$ .

$y = 1$

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

$y = (1) + 1$

Solve the equation for $y$ .

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Remove parentheses.

$y = 1 + 1$

Remove parentheses.

$y = (1) + 1$

Add $1$ and $1$ .

$y = 2$

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

$y = (2) + 1$

Solve the equation for $y$ .

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Remove parentheses.

$y = 2 + 1$

Remove parentheses.

$y = (2) + 1$

Add $2$ and $1$ .

$y = 3$

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

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