Question

Does the relation in the table represent direct variation, inverse variation, or neither? If it is direct or inverse variation, write an equation to represent the relation. Explain your answer.

x; 5,10,15,20
y; 2,1 ,2/3,1/2

Can someone please help me with this? I really don't understand what to do.

Answer 1

if xy is constant, it's inverse. xy=k
If y/x is constant, it's direct. y=kx

So, take a look and see what you find.

Answer 2

inverse ... y gets smaller as x gets bigger

x y = 10