Precalculus Examples

f (x) = 9 x

$f (x) = 9 x$

Step 1

Write

f (x) = 9 x

$f (x) = 9 x$ as an equation.

y = 9 x

$y = 9 x$

Step 2

Choose any value for

x

$x$ that is in the domain to plug into the equation.

Step 3

Choose

0

$0$ to substitute in for

x

$x$ to find the ordered pair.

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Step 3.1

Remove parentheses.

y = 9 (0)

$y = 9 (0)$

Step 3.2

Multiply

9

$9$ by

0

$0$ .

y = 0

$y = 0$

Step 3.3

Use the

x

$x$ and

y

$y$ values to form the ordered pair.

(0, 0)

$(0, 0)$

(0, 0)

$(0, 0)$

Step 4

Choose

1

$1$ to substitute in for

x

$x$ to find the ordered pair.

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Step 4.1

Remove parentheses.

y = 9 (1)

$y = 9 (1)$

Step 4.2

Multiply

9

$9$ by

1

$1$ .

y = 9

$y = 9$

Step 4.3

Use the

x

$x$ and

y

$y$ values to form the ordered pair.

(1, 9)

$(1, 9)$

(1, 9)

$(1, 9)$

Step 5

Choose

2

$2$ to substitute in for

x

$x$ to find the ordered pair.

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Step 5.1

Remove parentheses.

y = 9 (2)

$y = 9 (2)$

Step 5.2

Multiply

9

$9$ by

2

$2$ .

y = 18

$y = 18$

Step 5.3

Use the

x

$x$ and

y

$y$ values to form the ordered pair.

(2, 18)

$(2, 18)$

(2, 18)

$(2, 18)$

Step 6

These are three possible solutions to the equation.

(0, 0), (1, 9), (2, 18)

$(0, 0), (1, 9), (2, 18)$

Step 7

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