ANSWER
The correct answer is D.
EXPLANATION
The y-component of the vector, is the same as the vertical component of the vector.
We can see from the graph that each box in the grid is one unit.
The component of vector a is
[tex]\binom {2}{4}[/tex]
We count 4 boxes along the positive y- axis to get the y-component of vector a.
See graph in attachment.
