### Home > PC > Chapter 7 > Lesson 7.2.2 > Problem 7-57

7-57.

Use the fact that *y* = 1 when *x* = 1 to solve for *k*.

Substitute *k* back into your original equation.

To write *y* as a function of *x*, change *y* = to *f*(*x*) =.

7-57.

Use the fact that *y* = 1 when *x* = 1 to solve for *k*.

Substitute *k* back into your original equation.

To write *y* as a function of *x*, change *y* = to *f*(*x*) =.