Explanation: What is a vector?
A vector has a direction and a magnitude.
Usually you draw them as arrows and write them as a small letter with an arrow on top ().
To tell somebody how far and in which direction the vector points you write the x-component and the y-component in brackets.
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Excersice: Move the slider and look at the vector and the graphics.
If you think you know the answer to the vector, you can check it anytime.