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→Positive and Negative Direction
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|[[File:ForceNumberLineVertical.png|center|200px300px]]| style="height:20px; width:200px280px; text-align:center;" |If the 'up' direction is chosen to be [[Positive (Number)|positive]] then any [[vector]] pointing 'up' has a [[Positive (Number)|positive]] [[magnitude]] and any [[vector]] pointing 'down' has a [[Negative (Number)|negative]] [[magnitude]].
In this [[diagram]] the green [[vector]] has a [[magnitude]] of +2 while the red [[vector]] has a [[magnitude]] of -4.
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|[[File:ForceNumberLineHorizontal.png|center|400px600px]]
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| style="height:20px; width:200px600px; text-align:center;" |If the 'right' direction is chosen to be [[Positive (Number)|positive]] then any [[vector]] pointing 'right' has a [[Positive (Number)|positive]] [[magnitude]] and any [[vector]] pointing 'left' has a [[Negative (Number)|negative]] [[magnitude]].
In this [[diagram]] the blue [[vector]] has a [[magnitude]] of +3 while the yellow [[vector]] has a [[magnitude]] of -2.