I have been given the line equation of $y-8=0$, and have to find the unit normal vector? How would I go about doing this? is there a specific equation I need to use?
Following this I have been given the question: Find the equation of a line passing through point $A(9, −6)$ and orthogonal to vector $v=[−4,0]^T$. Which i am also unsure how to complete.
Any help would be much appreciated, it's been quite a while since i have done this sort of maths.