Respuesta :

calculista
we know that
With a scale factor of 3
the dilation is
(x,y)------------> (3x,3y)
so
for
(1,-1)--------> (1*3,-1*3)-----> (3,-3)

the answer is
the coordinate of B' is (3,-3)

Answer:

(3, –3)

Step-by-step explanation:

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