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January 30, 2015

January 30, 2015

Posted by **Hasane** on Thursday, March 14, 2013 at 9:43pm.

The student began the solution with the following:

Write f(x) = 3x-7 as y = 3x-7

x= 3y-7

The student eventually got the right answer for f^(-1)(x) [inverse notation] but did not get full marks for the solution. Why not?

- math -
**Steve**, Friday, March 15, 2013 at 9:43amhe got x as a function of y, but did not illustrate that

f^-1(x) = (x+7)/3

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