Answer:
See below.
Step-by-step explanation:
OB = OA + AB
AB = OB - OA
= 4x + 8y - (2x + 9y)
= 2x - y
CD = 4x - 2y
= 2(2x - y)
Therefore the vector CD has the same direction as AB (its the same line on the coordinate plane) but has twice the magnitude of AB. That is its represented by a line twice as long.).
