- #1

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## Homework Statement

which of the following are linear transformations.

a) L(x,y,z) = (0,0)

b) L(x,y,z) = (1 ,2, -1)

c) L(x,y,z) = (x^2 + y, y - z)

## The Attempt at a Solution

I know that L is a linear transformation if L(u + v) = L(u) + L(v) and L(ku) = kL(u).

I am not sure how to apply that to those equations.

Please help.