Each column of the matrix T=[ 0 0 3 0 3 0]
represents a vertex of a triangle. It Rosa scales the triangle by finding 3T,
what are the vertices of the scaled triangle?

parallel and congruent

step-by-step explanation:

the movement of translation is linear.   these have the same translation because you are using the same rule for each point of the triangle so you will see the same slope being used to get from a point on the triangle to its image.

same slope!   you should think parallel when you see those 2 word together (well unless it's the same line but it can't be because we are coming from different points here)

congruent! because each point is being moved the same distance.

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step-by-step explanation: