# How do you write an equation of a line in slope intercept form if the line has a slope of 2 and contains the point (1,-2)?

Oct 11, 2014

$y = m x + b \to$Slope intercept

$m =$slope
$b =$ y-intercept

$\left(x , y\right) \to$ the point

Make the substitutions to find the y-intercept, $b$

$- 2 = \left(2\right) \left(1\right) + b$

$- 2 = 2 + b$

$- 4 = b$

$y = 2 x - 4$