Find the inverse of the one-to-one function.
f(x) = 2x + 5/7
Is this one y=7y+5/2

Question

Find the inverse of the one-to-one function.
f(x) = 2x + 5/7
Is this one y=7y+5/2

anonymous · Answer

oops that is suppose to be y=7x+5/2

anonymous · Answer

solve implicite for x and then replace x by y, this gives you the inverse function

anonymous · Answer

So is that what I did my getting y=7x + 5 /2

anonymous · Answer

$$ y=2x+\frac{5}{7}  \
\therefore x = \frac{1}{2}\left(y-\frac{5}{7}\right)$$

anonymous · Answer

$$ f(\bar{x})=\frac{1}{2}\left(x-\frac{5}{7}\right)$$

anonymous · Answer

but my choice look like this
a. f^-1(x) = 7/2x+5
b. f^-1(x)  = 7 / 2x -5
c. f^-1(x) = 7x + 5 /2
d. f^-1(x)  = 7x - 5 / 2

anonymous · Answer

http://www.wolframalpha.com/input/?i=inverse+function+of+y%3D7x%2B%285%2F2%29

anonymous · Answer

Sorry, but in this case I can't help you, since I don't find any of the solutions above representing a inverse function of the one you have posted

anonymous · Answer

See that is what is confusing me because the answer I got to didn't match my choices

anonymous · Answer

thanks any ways I will call the school tomorrow about this one

anonymous · Answer

alright, you're welcome

anonymous · Answer

Keep in mind that you can verify your answer always for yourself, by drawing it in a xy-Coordinate system, it should be mirrored at y=x, which is the case for the function we have.

anonymous · Answer

okay thanks

anonymous · Answer

and also f(x) when you replace it by the inverse function for the original equation should be x, which is also the case for the function we have.