Precalculus Examples

y = x + 4

$y = x + 4$

Step 1

Substitute

- 2

$- 2$ for

x

$x$ and find the result for

y

$y$ .

y = (- 2) + 4

$y = (- 2) + 4$

Step 2

Solve the equation for

y

$y$ .

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Step 2.1

Remove parentheses.

y = - 2 + 4

$y = - 2 + 4$

Step 2.2

Remove parentheses.

y = (- 2) + 4

$y = (- 2) + 4$

Step 2.3

Add

- 2

$- 2$ and

4

$4$ .

y = 2

$y = 2$

y = 2

$y = 2$

Step 3

Substitute

- 1

$- 1$ for

x

$x$ and find the result for

y

$y$ .

y = (- 1) + 4

$y = (- 1) + 4$

Step 4

Solve the equation for

y

$y$ .

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Step 4.1

Remove parentheses.

y = - 1 + 4

$y = - 1 + 4$

Step 4.2

Remove parentheses.

y = (- 1) + 4

$y = (- 1) + 4$

Step 4.3

Add

- 1

$- 1$ and

4

$4$ .

y = 3

$y = 3$

y = 3

$y = 3$

Step 5

Substitute

0

$0$ for

x

$x$ and find the result for

y

$y$ .

y = (0) + 4

$y = (0) + 4$

Step 6

Solve the equation for

y

$y$ .

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Step 6.1

Remove parentheses.

y = 0 + 4

$y = 0 + 4$

Step 6.2

Remove parentheses.

y = (0) + 4

$y = (0) + 4$

Step 6.3

Add

0

$0$ and

4

$4$ .

y = 4

$y = 4$

y = 4

$y = 4$

Step 7

Substitute

1

$1$ for

x

$x$ and find the result for

y

$y$ .

y = (1) + 4

$y = (1) + 4$

Step 8

Solve the equation for

y

$y$ .

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Step 8.1

Remove parentheses.

y = 1 + 4

$y = 1 + 4$

Step 8.2

Remove parentheses.

y = (1) + 4

$y = (1) + 4$

Step 8.3

Add

1

$1$ and

4

$4$ .

y = 5

$y = 5$

y = 5

$y = 5$

Step 9

Substitute

2

$2$ for

x

$x$ and find the result for

y

$y$ .

y = (2) + 4

$y = (2) + 4$

Step 10

Solve the equation for

y

$y$ .

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Step 10.1

Remove parentheses.

y = 2 + 4

$y = 2 + 4$

Step 10.2

Remove parentheses.

y = (2) + 4

$y = (2) + 4$

Step 10.3

Add

2

$2$ and

4

$4$ .

y = 6

$y = 6$

y = 6

$y = 6$

Step 11

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

\begin{array}{c} x & y \\ - 2 & 2 \\ - 1 & 3 \\ 0 & 4 \\ 1 & 5 \\ 2 & 6 \end{array}

$\begin{array}{c} x & y \\ - 2 & 2 \\ - 1 & 3 \\ 0 & 4 \\ 1 & 5 \\ 2 & 6 \end{array}$

Step 12

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