Question

Which vector has a y-component with a length of 4?

Answer 1

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

$\binom {2}{4}$

We count 4 boxes along the positive y- axis to get the y-component of vector a.

See graph in attachment.