Problem 4.1:
What is the difference between a vector and a ray?
Problem 4.2:
A vector has origin at (1,2) and endpoint at (-3,-4). What is the horizontal,
or
x-component of this vector?
Problem 4.3:
How many vectors are needed to form the coordinate plane?
Problem 4.4:
A vector has origin at (-3,5) and endpoint at (0,8). What is the magnitude of
this vector?
