Need some help with vectors and functions or any website with these information relating to vectors and functions.
VECTORS
-addition, subtraction, and multiplication of vectors by a scalar
-displacement and position vectors
-magnitude of a vector
-equal. Parallel and perpendicular vectors

FUNCTIONS
-curve sketching
-functions

http://www.cut-the-knot.org/do_you_know/mul_vec.shtml is a good site to use. You could also try: http://hypertextbook.com/physics/foundations/vector-multiplication/

I agree with Kadehadaire. Those are some good sites.