Algebra Examples

$4 x + y - 2 = 0$

Step 1

Choose a point that the parallel line will pass through.

$(0, 0)$

Step 2

Rewrite in slope-intercept form.

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Step 2.1

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Step 2.2

Move all terms not containing $y$ to the right side of the equation.

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Step 2.2.1

Subtract $4 x$ from both sides of the equation.

$y - 2 = - 4 x$

Step 2.2.2

Add $2$ to both sides of the equation.

$y = - 4 x + 2$

Step 3

Using the slope-intercept form, the slope is $- 4$ .

$m = - 4$

Step 4

To find an equation that is parallel, the slopes must be equal. Find the parallel line using the point-slope formula.

Step 5

Use the slope $- 4$ and a given point $(0, 0)$ to substitute for $x_{1}$ and $y_{1}$ in the point-slope form $y - y_{1} = m (x - x_{1})$ , which is derived from the slope equation $m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$ .

$y - (0) = - 4 \cdot (x - (0))$

Step 6

Simplify the equation and keep it in point-slope form.

$y + 0 = - 4 \cdot (x + 0)$

Step 7

Solve for $y$ .

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Step 7.1

Add $y$ and $0$ .

$y = - 4 \cdot (x + 0)$

Step 7.2

Add $x$ and $0$ .

$y = - 4 x$

Step 8