The short term demand for a product can be approximated by $\displaystyle q=D(p) = 10 - 0.7 p$, where $p$ represents the price of the product, in dollars, and $q$ is the quantity demanded.

Find the elasticity function $E(p)=$ .

Evaluate the elasticity at 8 dollars.

$E(8)$ =

Round to three decimal places as needed.

Hint: