1. The problem statement, all variables and given/known data See figure for problem statement. It asks if a given line lies in a given plane. 2. Relevant equations 3. The attempt at a solution Okay so first I translated the line into its parametric equations and then I subbed those into the equation of the plane respectively. After simplifying you'll find that, [tex]9t-1 = -1[/tex] Now my solutions manual states the following, *NOTE* There is no symbol for not-equivalent in tex, so I'm writing NE [tex]9t -1 NE -1[/tex] Why is this so? Why not let t = 0, and then -1 = -1 and then all will be well in world, no? What am I missing?