SOLUTION: Hooke's Law states that the distance a spring strethes varies directly as the weight on the spring. A weight of 67 pounds stretches a spring 6 inches. How far will a weight of 81

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Question 317481: Hooke's Law states that the distance a spring strethes varies directly as the weight on the spring. A weight of 67 pounds stretches a spring 6 inches. How far will a weight of 81 pounds stretch the spring? Round to the nearest tenth of an inch. Please show me how to work this!
thank you in advance
cz
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+d=kW+
Use your data to determine k.
6=k%2867%29
k=6%2F67
So then the equation is,
d=%286%2F67%29W, when W is in lbs, d in inches.
When W+=+81 lbs, then
d=%286%2F67%29%2A81=486%2F67+or approximately
d=7.25 inches.