Here is the graph for the question:

Question

Year|Average Gas Price
2005|$2.25
2006|$2.25
2007|$3.05
2008|$2.78
2009|$2.25
2010|$2.52
2011|$3.40
2012|$3.51
2013|$3.40
2014|$2.96
2015|$2.34

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.

Can someone please help me? Iv'e been doing math all day and my brain is fried....Please help...(=

Answer 1

up, down, up, down
could try a polynomial (a x^4 + b x^3 etc...) but they are dangerous when you try to continue them out because they go to infinity for big t
maybe a sine wave with an up trend?
the domain is 2005 to 2015
the range is 2.25 to 3.51

price = a t + b sin( 2 pi t/T) maybe?

Answer 2

Ok, thanks. What would an equation be for this in slope intercept form or point slope form?

Answer 3

Please explain???

Answer 4

neither, I am not trying to fit that with a line.
You might try point - slope
but it will not fit very well.
Your data is too bumpy to fit well with a straight line.

Answer 5

Ok, so then what should I put as my answer? It says to make an equation....)=