Well.. .not exactly what you're asking, but the relationship of them is

so... hmm to add some
for example let's say
The symmetric property of equality.
This property states that: if a = b, b = a.
Information we know:
a 15 ounce cup takes 3 second to fill
determine variables:
x=3
y=15
rate:
y/x=3/15= 0.2
fixture an equation:
y=kx
y=0.2x
plug in 40 for x:
y=0.2(40)
=8
Thus, it should take 8 seconds to fill a 40-ounce cup of soda.
About 0.5 percent per year