rewriting equations in function forms

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Aug 31, 2006
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how do u rewrite an equation in function form, so that Y is a function of X. (show all steps)

Problem:

4x - 3(y - 2) = 15 + y


how do u rewrite an equatio so that X is a function of Y. (show all steps)

Problem:

5y - 2(x - 7) = 20
 

Denis

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Feb 17, 2004
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Re: rewriting equations in funtion forms

inspirational_godess said:
how do u rewrite an equation in function form, so that Y is a function of X. (show all steps)
and
how do u rewrite an equatio so that X is a function of Y. (show all steps
What does "u" mean? A variable?

4x - 3(y - 2) = 15 + y
4x = 15 + y + 3(y - 2) : do you understand that?

3(y - 2) = 3y - 6 : do you understand that?

If not, not much can be done here: not a classroom.
 

stapel

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Re: rewriting equations in funtion forms

inspirational_godess said:
how do u[sic] rewrite an equation in function form, so that Y is a function of X[?]
Solve the equation for "y=".

In general, solve the equation for "(function name) = (something with the other variable)". For instance, given "3s + 4t = 6", one could do the following:

. . .Solve for s as a function of t:

. . . . .3s + 4t = 6
. . . . .3s = 6 - 4t
. . . . .s = 2 - (4/3)t

. . .Solve for t as a function of s:

. . . . .3s + 4t = 6
. . . . .4t = 6 - 3s
. . . . .t = (3/2) - (3/4)s

Follow this procedure with your exercises. If you get stuck, please reply showing how far you have gotten. Thank you.

Eliz.
 
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Aug 31, 2006
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It really helped. thank you. i took the test today and i think i pretty much aced it.
 

stapel

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inspirational_godess said:
i took the test today and i think i pretty much aced it.
Congratulations! :D

Eliz.
 
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