Answer:
B
Step-by-step explanation:
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B. (21, 6)
The preimage coordinates are multiplied by the dilation factor to obtain the image coordinates. If P is the preimage point and the dilation factor is 1/3, you have ...
(1/3)P = (7, 2)
P = 3(7, 2) = (3·7, 3·2)
P = (21, 6)
The preimage point is (21, 6).
y=-x+9
a. x<7 and x>-7
√x²<√49
-7<x<7 hope this helps
