SAve me by answering this Dilation questionnnn!!!!

9514 1404 393
Answer:
3 units
Step-by-step explanation:
B'C' = 9 units = 3 × BC
BC = (9 units)/3 = 3 units
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The scale factor multiplies all lengths of the preimage to give you the lengths of the image. You can count the grid squares to find the length of B'C' = 9.