The coordinates of the vertices of triangle def are given in the table.

d e f
(0,7) (2,9) (4,1)

triangle def is reflected across the x-axis.

what are the vertices of triangle d'e'f'?

enter your answers in the boxes.

We know that the vertices of triangle DEF are:
D ( 0, 7 ); E ( 2 , 9 ) and F ( 4, 1 ).
When it is reflected across the x-axis x coordinates stay the same and y coordinates changes the sign.

The vertices of triangle D`E`F` are:
D` ( 0, - 7 )
E`( 2. - 9 )
F` ( 4, - 1 )

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D.