The following set of ordered pairs represents a power inverse variation. (2,4),(1,32),(4,1/2)
what is the value of r

the kind of function they're looking for is y=k/x^r
I've gotten this far
4=k/2^2=r
but I can't figure out how to get k or r without having the other one first

Can you draw an isosceles triangle with only one 80 degree angle?

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040