1. Section 9.4
Vectors

2. Vectors
Vector: a quantity that has both magnitude and direction. Represented by a ray with an arrow Magnitude: length of ray Direction: indicated by the arrow head.

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13. #15) 3v + u – 2w x y O 5

14. #21) Is E + D = G + H ?

17. This is a fancy way to say ai is the run of the vector(i is like x) and bj is the rise/fall of the vector(j is like y)
So if the vector has initial (starts) point (2,-3) and a terminal (ends) point (4,2) then you can write the vector as..
v = 2i + 5j (2 is the distance between the x coordinates and 5 is the distance between y coordinates)

18. Find the position vector if P is the initial point and Q is the terminal point.
#27) P = (0,0) and Q = (3,4)
#31) P = (-2,-1) and Q = (6,-2)