HELP! Carlos needed to draw two lines at a 90 degree angle to continue the grid that he was making. Which is an equation of a line that is perpendicular to line MN?

A. 2x + 6y = -2
B. 3x - y = 7
C. 3x + 9y = -4
D. 12x + 4y = -9

Question

HELP! Carlos needed to draw two lines at a 90 degree angle to continue the grid that he was making. Which is an equation of a line that is perpendicular to line MN?

 A. 2x + 6y = -2
 B. 3x - y = 7
 C. 3x + 9y = -4
 D. 12x + 4y = -9

anonymous · Answer

What is the equation for line MN?

anonymous · Answer

it doesnt have one

anonymous · Answer

Perpendicular lines have the opposite reciprocal slope from each other.

anonymous · Answer

For example y=2x+1 is perpendicular to y= -1/2 x +4.
If this problem doesn't give an equation for MN then I don't see how you're supposed to get it.