Pre-Algebra Examples

$- 15 x + y = 21$

Step 1

Rewrite in slope-intercept form.

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Step 1.1

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 1.2

Add $15 x$ to both sides of the equation.

$y = 21 + 15 x$

Step 1.3

Reorder $21$ and $15 x$ .

$y = 15 x + 21$

Step 2

Using the slope-intercept form, the y-intercept is $21$ .

$b = 21$

Step 3

y-intercept in point form.

$(0, 21)$

Step 4