Find the Equation Using Slope-Intercept Form m=3 , (0,-8)

$m = 3$ , $(0, - 8)$

Step 1

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

Use the formula for the equation of a line to find $b$ .

$y = m x + b$

Substitute the value of $m$ into the equation.

$y = (3) \cdot x + b$

Substitute the value of $x$ into the equation.

$y = (3) \cdot (0) + b$

Substitute the value of $y$ into the equation.

$- 8 = (3) \cdot (0) + b$

Find the value of $b$ .

Rewrite the equation as $(3) \cdot (0) + b = - 8$ .

$(3) \cdot (0) + b = - 8$

Simplify $(3) \cdot (0) + b$ .

Multiply $3$ by $0$ .

$0 + b = - 8$

Add $0$ and $b$ .

$b = - 8$

Step 2

Now that the values of $m$ (slope) and $b$ (y-intercept) are known, substitute them into $y = m x + b$ to find the equation of the line.

$y = 3 x - 8$

Step 3