How do you write an equation of a line passing through (-2,-2), perpendicular to y= -1/3x + 9?

1 Answer
Jun 28, 2016

The product of perpendicular gradients is equal to -1.

Explanation:

Gradient of line perpendicular to line given is 3. Using general form $y - b = m \left(x - a\right)$ obtain:

$y + 2 = 3 \left(x + 2\right)$

$y = 3 x + 4$