Find the Equation Using Slope-Intercept Form m=5 (3,3)

$m = 5$ $(3, 3)$

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.

$y = (5) \cdot x + b$

Substitute the value of $x$ into the equation.

$y = (5) \cdot (3) + b$

Substitute the value of $y$ into the equation.

$3 = (5) \cdot (3) + b$

Find the value of $b$ .

Rewrite the equation as $(5) \cdot (3) + b = 3$ .

$(5) \cdot (3) + b = 3$

Multiply $5$ by $3$ .

$15 + b = 3$

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

Subtract $15$ from both sides of the equation.

$b = 3 - 15$

Subtract $15$ from $3$ .

$b = - 12$

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.

$y = 5 x - 12$

Step 3