Question 1190728
<font color=black size=3>
y varies directly as x means
y = kx
for some fixed constant k


y = 90 when x = 1/9
Use that to find k
y = kx
90 = k(1/9)
90*9 = k
810 = k
k = 810


The variation constant is 810
The equation is y = 810x
</font>