requesting "elastic demand" exercise help

[maxboy0801]

I am just not understanding a demand problem I have. It is multiple choice which means it should be easy, but I am just retarded.

The demand for ground chuck (hamburger) in a certain region of the United States is given by q=2.79p^-.23. Is the demand for ground chuck elastic or inelastic?

a. Inelastic
b. The demand has unit elasticity.
c. Elastic
d. None of these

Does anyone have any advise they could offer?

 

[stapel]

How does your book define "elasticity" of demand?

Please reply with specifics, showing your work thus far.

Thank you.

Eliz.

P.S. to tutors: Yes, "they're" back.