Pre-Algebra Examples

$\log (x)$

Step 1

Find the asymptotes.

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Set the argument of the logarithm equal to zero.

$x = 0$

The vertical asymptote occurs at $x = 0$ .

Vertical Asymptote: $x = 0$

Step 2

Find the point at $x = 1$ .

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Replace the variable $x$ with $1$ in the expression.

$f (1) = \log (1)$

Simplify the result.

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Logarithm base $10$ of $1$ is $0$ .

$f (1) = 0$

The final answer is $0$ .

$0$

Convert $0$ to decimal.

$y = 0$

Step 3

Find the point at $x = 10$ .

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Replace the variable $x$ with $10$ in the expression.

$f (10) = \log (10)$

Simplify the result.

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Logarithm base $10$ of $10$ is $1$ .

$f (10) = 1$

The final answer is $1$ .

$1$

Convert $1$ to decimal.

$y = 1$

Step 4

Find the point at $x = 2$ .

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Replace the variable $x$ with $2$ in the expression.

$f (2) = \log (2)$

The final answer is $\log (2)$ .

$\log (2)$

Convert $\log (2)$ to decimal.

$y = 0.30102999$

Step 5

The log function can be graphed using the vertical asymptote at $x = 0$ and the points $(1, 0), (10, 1), (2, 0.30102999)$ .

Vertical Asymptote: $x = 0$

$\begin{array}{c} x & y \\ 1 & 0 \\ 2 & 0.301 \\ 10 & 1 \end{array}$

Step 6