The vertices of Triangle DEF are D (-7, 10), E (-5, 5), and F (-8, 1). D (-7,10) E(-5,5) F (-8,1) : If Triangle DEF is translated up 9 units, what are the coordinates of the vertices of the image? Name the triangle.
To translate up 9 units, add 9 to each y-coordinate. You can rename the points as D', E', and F' (D prime, E prime, and F prime) and write the new triangle as triangle D'E'F'
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