Answer
119.283 kg.
Work Step by Step
$ŷ =1.6942x−142.4709$ (Problem 20 in section 4.2)
For a randomly selected American black bear that is 154.5 cm long, that is, $x=154.5$:
$ŷ =1.6942\times154.5−142.4709=119.283$
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