Precalculus Examples

$m = - 9$ , $b = 2$

Step 1

Find the value of $b$ using the formula for the equation of a line.

$y = m x + b$

Step 2

Replace the known value of $m$ in the slope y-intercept form of the equation.

$y = (- 9) \cdot x + b$

Step 3

Replace the known value of $b$ in the slope y-intercept form of the equation.

$y = (- 9) \cdot x + 2$

Step 4

Simplify the slope y-intercept form of the equation.

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Step 4.1

Remove parentheses.

$y = (- 9) \cdot x + 2$

Step 4.2

Multiply $- 9$ by $x$ .

$y = - 9 \cdot x + 2$

Step 4.3

Remove parentheses.

$y = (- 9) \cdot x + 2$

Step 4.4

Multiply $- 9$ by $x$ .

$y = - 9 x + 2$

Step 5