in the xy-plan, line t passes through the origin and is perpendicular to the line 4x+y= k, where k is a constant. If the two lines intersect at the point (t, t+1). WHat is the value of t? What is t, and t+1? I know that y= -4x +k and perpendicular to that would be y=(1/4)x+k but where should i go from there?