Reflect triangle A in the line y = 1.

Step-by-step explanation:

In the figure attached,

Vertices of the triangle ABC are A(-4, 4), B(-1, 4) and (-1, 2)

When we reflect this figure across a line y = 1

Vertices of the image triangle A'B'C' will be

Coordinates of A'

A(-4, 4) → A'[(1 + 5), 4]

            → A'(6, 4)

Coordinates of B'

B(-1, 4) → B'(-1 + 4, 4)

           → B'(3, 4)

Coordinates of C',

C(-1, 2) → C'[(-1 + 4), 2]

           → C'(3, 2)

Graph these points and join them to form the image triangle A'B'C'.

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3

step-by-step explanation: