Before you work with matrices
by Froga
The ideas the Linear Algebra lab assumes: reading coordinates, adding vectors, what multiplying by a matrix actually does to a point, and what it means for a determinant to be zero. Ten minutes.
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Study material
The first number, x, says how far to move right (or left, if negative). The second number, y, says how far to move up (or down, if negative). (3, -2) means 3 steps right and 2 steps down from the origin.
A point is written (x, y). What does the point (3, -2) mean?
multiple choice
A3 steps right, 2 steps down
B3 steps up, 2 steps left
C3 steps left, 2 steps up
D2 steps right, 3 steps down
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