To solve this problem you must apply the proccedure shown below:
1. You have that
varies jointly as
and
and inversely as the product of
and
. Therefore, you can write the following equation, where
is the constant of proportionality:

2. Now, you must solve for the constant of proportionality, as following:

3. Susbtiute values:


4. Substitute the value of the constant of proportionality into the equation:

The answer is: 
Answer:
its A: (-1,-1/2)
Step-by-step explanation:
Find the holes in the graph by factoring and cancelling.
Answer:
its 2 1/2 its width
Step-by-step explanation: