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Given:

$X_1 = 100, Y_1 = 64$

$X_2 = 70, Y_2 = 34$

$X_3 = 50, Y_3 = 14$

I need to find the $Y = F(X)$ formula.

I can run across that $X_2 - X_1 = Y_2 - Y_1$, but $X_2/X_1 \neq Y_2/Y_1$.

P.S. This is non homework, i'm trying to piece of work out some CSS properties which touch each other, my math is simply terrible. Thanks!

  • linear-algebra
  • functions

iam_agf's user avatar

iam_agf

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asked Jul 2, 2020 at 17:21

Cristian E.'s user avatar

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4

  • $\begingroup$ I believe $Y=X-36$ works. $\endgroup$

    Jul 2, 2020 at 17:25

  • $\begingroup$ Why I always complicate things and ignore simple operations :D ? $\endgroup$

    Jul ii, 2020 at 17:27

  • $\begingroup$ It'due south a good learning moment though! If changing $X$ e'er causes a proportional change in $Y$, and so the equation you're looking for is linear, $Y=mX+b$. In this case, the "proportional" change in $Y$ is exactly the same change equally the change in $X$, which is why $1000=1$ in this case. $\endgroup$

    Jul 2, 2020 at 17:28

  • $\begingroup$ @GregMartin Thank you very much. This makes then much sense now! $\endgroup$

    Jul two, 2020 at 17:31

1 Answer 1

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There are many possibilities. Unproblematic ane is to : pass a circle through the iii points and observe its equation

answered Jul 2, 2020 at 17:27

Narasimham's user avatar

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