Vector Notation and Column Vectors

Describing a movement

A vector is written as a column: (x on top, y on bottom), showing how far to move across and up/down - like directions to a friend's homestead: "go 4 right, 3 up".

Example: The vector from point A(1,2) to point B(5,7) is written AB = (4, 5) - found by (x&sub2;-x&sub1;, y&sub2;-y&sub1;).

A negative vector reverses the direction: -AB = (-4,-5) takes you from B back to A.

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Related Exercises

Write column vectors

Find the vector from A(2,3) to B(6,8).Find the vector from P(-1,4) to Q(3,-2).Given vector a = (5,-2), write down -a.

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