The variable Z is inversely proportional to X. When X is 10, Z has the value 1.9. What is the value of Z when X = 13

Question

The variable Z is inversely proportional to X.  When X is 10, Z has the value 1.9.

What is the value of Z when X = 13

 

Answer 1

The variable Z is inversely proportional to X  MEANS  Z = K/X.

The second sentence tells you one situation where Z = 1.9 & X = 10; plug in, find out what K is.

Lastly, now that you know K and you are told that X=13, you are able to calculate the requested Z.

E A S Y !!