If triangle abc is reflected across line m, the new coordinates will be located at a’(2, -4) b’(7, -7) c’(-2, -7).
graph grid with the x-axis going from negative 10 to 10 and the y-axis going from negative 10 to 10; purple triangle a b c has the coordinates (2, negative 2), (7, 3), and (negative 2, 3), respectively; horizontal line m for y equals negative 3

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