Question

Somebody please help me!?!?!When x = 2 and y = 3, z = 42. Write the function that models each of the following relationships.

Answer 1

1) z varies inversely with x and directly with y.

Answer 2

direct variation of y on x (for example) means y = k x for some constant k
inverse variation of y on x means y = k/x for some k
if you are given a pair of numbers x,y then you have enough info to find k.
replace x,y with their values in y=kx and solve for k. same for the inverse variation