ok. question. don't know how to approach from MATH1002
if i'm given 2 points, say, P(x,y,z) and Q (X,Y,Z) and i want to find the line through them, i assume i use the formula (if wanting parametric vector eqn)
r = ro +tv
now do i take P to be ro and Q to be r, or do i make Q into the...