Question

write the function that models each variation. find z when x=4 and y=9.
z varies directly with x and inversely with y. when x=6 and y=2, z=15.

Answer 1

z varies directly with x and inversely with y.
z=kx/y, where k is any constant

x=6, y=2, z=15
15 = k(6)/2
15 = 3k
k=5

z=3x/y
when x=4 & y=9
z= 3(4)/9 = 12/9 = 4/3

Answer 2

do you get it now?

Answer 3

yes.thanks

Answer 4

medal?

Answer 5

yeah