Gas Prices

[ImagineDragons]

This is about average gas prices from 2005-2015

2005 - $2.27
2006 - $2.57
2007 - $2.80
2008 - $3.25
2009 - $2.35
2010 - $2.78
2011 - $3.52
2012 - $3.62
2013 - $3.51
2014 - $3.36
2015 - $2.43

c. What equation models the data? What are the domain and range of
the equation? Do you think your equation is a good fit for the data?
Explain how you determined your answers.

I don't get any of this

[Baldric]

https://www.theanswerbank.co.uk/members/imaginedragons/

Looks like homework to me ;o)

[Calibax]

Try plotting them on a graph. Does the graph resemble a function/equation? Google how to find the domain and range of a function if you haven't been taught it.

[fiction-factory]

I think it is worth having a chat to your tutor about the issues you are having with this course, as you are finding it necessary to ask for so much help on here.
Given that a few days ago you were doing questions on scatter graphs and lines of best fit I think that is what this question is expecting you to do. However I am not sure that it is a good approach for time series data. I am pretty sure you will find there is not a strong correlation between time and prices here.

[fiction-factory]

If you put the data into a spreadsheet it will do the lines of best fit for you for linear and quadratic functions and polynomials of higher orders, and give the corresponding R squared correlaton values. You get quite a good fit for polynomials of order 3 or 4. I'm pretty sure based on your other questions that we are just looking at linear functions here