GMAT Problem Solving (PS) | Re: Line l is defined by the equation y – 5x = 4 and line w is d

Line l is defined by the equation y – 5x = 4 and line w is defined by the equation 10y + 2x + 20 = 0. If line k does not intersect line l, what is the degree measure of the angle formed by line k and line w? (Assume that all lines lie in one coordinate plane.)

(A) 0
(B) 30
(C) 60
(D) 90
(E) It cannot be determined from the information given

I am really afraid of co-ordinate geometry.I always find it quite difficult.Plz need detail explanation.anyone plz help me