# parametric equations

• Sep 10th 2008, 06:56 PM
Allie
parametric equations
(A) Find the parametric equations for the line through the point P = (-5, -4, 1) that is perpendicular to the plane http://mathcs.chapman.edu/webwork2_f...5c2e08db31.png
Use "t" as your variable, t = 0 should correspond to P, and the velocity vector of the line should be the same as the standard normal vector of the plane.
(B) At what point Q does this line intersect the yz-plane?

how do I start this?
• Sep 10th 2008, 10:39 PM
mr fantastic
Quote:

Originally Posted by Allie
(A) Find the parametric equations for the line through the point P = (-5, -4, 1) that is perpendicular to the plane http://mathcs.chapman.edu/webwork2_f...5c2e08db31.png
Use "t" as your variable, t = 0 should correspond to P, and the velocity vector of the line should be the same as the standard normal vector of the plane.
(B) At what point Q does this line intersect the yz-plane?

how do I start this?

The line has direction -3i + 2j - k (same as the normal to the given plane) and passes through the point (-5, -4, 1) ....