I need help with this....please someone help me!!!!?

Question

In the year 2000 carbon dioxide emissions from electricity were 801.2 metric tons. On average emissions had been rising at a pace of about 18 metric tons per year.
a. Write the emissions as a linear funstion of the year. for convinience you can let the year 2000 be " zero"
b. what would we predict the emissions to be in 2005?
c. At what time do we predict emissions will exceed 1000 metric tons?

Answer 1

Part a: emissions = 18(Y-2000) + 801.2 metric tons; where Y = the current year.

Part b: 18(2005-2000) + 801.2 = 891.2

Part c: 2000 + [(1000-801.2)/18] = 2011.4 (note 0.4 of a year is about 5 months).