Precalculus Examples

$f (x) = x + 3$

Step 1

Write $f (x) = x + 3$ as an equation.

$y = x + 3$

Step 2

Choose any value for $x$ that is in the domain to plug into the equation.

Step 3

Choose $0$ to substitute in for $x$ to find the ordered pair.

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Step 3.1

Remove parentheses.

$y = 0 + 3$

Step 3.2

Remove parentheses.

$y = (0) + 3$

Step 3.3

Add $0$ and $3$ .

$y = 3$

Step 3.4

Use the $x$ and $y$ values to form the ordered pair.

$(0, 3)$

Step 4

Choose $1$ to substitute in for $x$ to find the ordered pair.

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Step 4.1

Remove parentheses.

$y = 1 + 3$

Step 4.2

Remove parentheses.

$y = (1) + 3$

Step 4.3

Add $1$ and $3$ .

$y = 4$

Step 4.4

Use the $x$ and $y$ values to form the ordered pair.

$(1, 4)$

Step 5

Choose $2$ to substitute in for $x$ to find the ordered pair.

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Step 5.1

Remove parentheses.

$y = 2 + 3$

Step 5.2

Remove parentheses.

$y = (2) + 3$

Step 5.3

Add $2$ and $3$ .

$y = 5$

Step 5.4

Use the $x$ and $y$ values to form the ordered pair.

$(2, 5)$

Step 6

These are three possible solutions to the equation.

$(0, 3), (1, 4), (2, 5)$

Step 7