An engineer is testing a freight train under different loads. He finds that the more freight the train is pulling, the slower it goes. He kept track of a few trials in the table you see here.

If the pattern continues, at what weight would the train fail to move at all?

Question

An engineer is testing a freight train under different loads. He finds that the more freight the train is pulling, the slower it goes. He kept track of a few trials in the table you see here.


If the pattern continues, at what weight would the train fail to move at all?

kl0723 · Answer

I guess you need to post the table :P

anonymous · Answer

attachment

anonymous · Answer

@kl0723

kl0723 · Answer

can you notice the pattern here? for every 5 tons of weight you add, you subtract the following odd number from the train's speed, so if you can notice, the first 5 tons, your speed is 72, add 5 tons more and the speed goes down by the amount of the next odd number which is 1

anonymous · Answer

You can observe that with every 5 increase in weight, the speed of the train decreases by 1, then 3, then 5, then 7, then 9, etc...

So follow that pattern until you get to 0.

anonymous · Answer

Ok thank you both.