Well! The way u have presented the graph of gas is quite simple and easily understandable.As the graph shows that price is flactuating, hence from this graph we may evalaute or predict the future prices of Gas. The predicted price may vary but the chances or it my not vary.

So accordingly the companies , factories or projects running on Gas may make the necessary arrangements in case of inflation or deflation and get least affected by the flactuation of the Gas prices.