I'm new to regressions and also new to posting here.

My topic is: How have E-books Affected College Textbook Prices?

My hypothesis is:

H0: The CPI for college textbooks will fall with the introduction of the e-book because increased innovation and competition causes an increase in supply causing prices to fall.

H1: The CPI for college textbooks is unaffected by the introduction of the e-book.

(I can change my alternative and probably will since my r2 is >80% as of now...)

I have basically no idea how to do regressions so I used a online helper and I came up with this:

My dependent variable (x) is the CPI for College Textbooks by the BLS from 2001 to 2016 separated by year.

My independent variable (y) is the # of ebooks sold from 2001 to 2016 separated by year.

Which gave me these results:

View attachment 6534

What I'm trying to figure out is what does all of this mean? My p val is <.0001 which is good I think but I need help putting what all of this info means in words?

Also, I have other variable (control variables I'm guessing?) such as the Consumer Price Index for College Tuition and Fees, GDP, and Higher ED Enrollment among other things and I want them to be a part of the regression. The prob is I don't know how to add them into it!!!

Any help is appreciated.

Thank you so much an advance!

PS I have the data in excel and can include also.