Algebra Examples

$f (x) = - 3 | x - 1 | + 12$

Step 1

To find the $x$ coordinate of the vertex, set the inside of the absolute value $x - 1$ equal to $0$ . In this case, $x - 1 = 0$ .

$x - 1 = 0$

Step 2

Add $1$ to both sides of the equation.

$x = 1$

Step 3

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

$y = - 3 | (1) - 1 | + 12$

Step 4

Simplify $- 3 | (1) - 1 | + 12$ .

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Step 4.1

Simplify each term.

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Step 4.1.1

Subtract $1$ from $1$ .

$y = - 3 | 0 | + 12$

Step 4.1.2

The absolute value is the distance between a number and zero. The distance between $0$ and $0$ is $0$ .

$y = - 3 \cdot 0 + 12$

Step 4.1.3

Multiply $- 3$ by $0$ .

$y = 0 + 12$

Step 4.2

Add $0$ and $12$ .

$y = 12$

Step 5

The absolute value vertex is $(1, 12)$ .

$(1, 12)$

Step 6