The following set of ordered pairs represents a power inverse variation. Find the value of r given that k = 5.

r=2

Step-by-step explanation:

y = k x^r  is the formula for a direct variation

y = k x^ -r is the formula for a indirect variation

20= 5 (1/2)^ -r

Divide each side by 5

4 = (1/2) ^ -r

Rewriting

2^2 = 2^ -1 ^ -r

2^2 = 2 ^ r

The bases are the same so

2 =r

the perimeter is increased by a factor of 2

the answer is simply just 6n add the two together as they have an n