kittystackexchange

My cousin was doing some maths, but he did not have any idea how to resolve it.
I don't know equation, so I post it here and hope someone kindly help him figure out whether there is an equation that can approximate the value of X.

Here are the results, but with an unknown value x: When

Altitude (y) = 0.119, f(y) = 4.9
Altitude (y) = 0.1199, f(y) = 4.99
Altitude (y) = 0.11999, f(y) = 4.999
Altitude (y) = 0.12, f(y) = x
Altitude (y) = 0.12001, f(y) = 5.001
Altitude (y) = 0.1201, f(y) = 5.01
Altitude (y) = 0.121, f(y) = 5.1

What is the value of x?

This is my first time posting a maths question in this forum; please forgive me if my questions violate the rules.

Thank you.

skeeter

here is one possible function that is continuous ...

$f(y) = 100y-7 \implies f(0.12) = 5$

then again, here is a function with a discontinuity at $y=0.12$, i.e., $f(0.12)$ is undefined, but will yield the same values as given in your table ...

$f(y) = \dfrac{(100y-7)(100y-12)}{100y-12}$

Denis

Why can't your "cousin" ask for help on his own?

kittystackexchange

Thank you Denis.
I can't tell you much about my profile.
(She is korean and her English isn't good enough)

kittystackexchange

Many thanks for the quick help, skeeter!

kittystackexchange

I wanted to add some more information, but the edit button is gone

skeeter

"Quote" your post and edit for a new post ...