This is something every driver watches. The price of gas and how it changes.

According to GasBuddy, the price for a gallon of gas in 2019 will see a 3 cent drop, which will the make yearly national average $2.70.

Now how is the price of gas determined for the whole year?

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"By looking at dozens of factors and essentially analyzing past trends and how they affected prices but this is certainly a very delicate science of making assessments of supply and demands and global trends and coming up with a forecast in the year ahead,” says Patrick DeHaan, head of Petroleum Analysis at GasBuddy. “To kind of review the forecast last year, it was off by just 6%. We have a fairly decent accuracy but like with all forecasts certainly like we highlight with all forecasts, there are things that could change would ultimately happen in 2019 at the pump"

By having this estimate ahead of time, it helps drivers budget for the year.

"It's also kind of a key indicator of where demand will go so it's always good to kind of be armed with more information about where prices are going so motorists can have some idea for what to expect," said DeHaan.

Prices tend to increase during the spring and summer and the national average could surge to over $3.00 per gallon as soon as May.

"The demand for gasoline is higher in the summer. We also have more expense of summer gasoline to contend with as well so looking at the course of the year, gas prices are almost always highest in the summer and they are lowest in the winter," says DeHaan.

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The nation's yearly gas bill will fall to less than $390 billion, which is a $2.5 billion drop over last year.

The average household could see a $25 drop in their yearly gasoline spending.

GasBuddy employees say the events that occur in 2019 could be a major impact on what actually happens with the gas prices.

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