The world is using more crude oil every year. In 2000 the world used about 76 million barrels a day and in 2010 the would be used about 87 million barrels a day. Assuming this is a linear trend come up with an equation for this. In addition, if consumption is not curved how many will we use in 2050? Can this trend be made less linear? Can it be flattened? Modeling this, what would it look like?