GIVING 50 POINTS!! AND BRAINIEST Stretch △DEF with points D(−2, 1), E(−1, −1), and F(−2, −2) horizontally and vertically by a factor of 4.Stretching △DEF horizontally and vertically by a factor of 4 results in the transformed points D'____ E' ____F' ____

For this case we have to apply the following transformation:
 (x, y) -------> (4x, 4y) --------> (x ', y')
 Applying the transformation to the vertices we have:
 (-2, 1) -------> (4 (-2), 4 (1)) --------> (-8, 4)
 (-1, -1) -------> (4 (-1), 4 (-1)) --------> (-4, -4)
 (-2, -2) -------> (4 (-2), 4 (-2)) --------> (-8, -8)
 Answer:
 Stretching △DEF horizontally and vertically by a factor of 4 results in the transformed points 
 D '(-8, 4)
 E '(-4, -4)
 F '(-8, -8)