Answer: Our equation becomes,
![y=22x\ ;\ x\leq 40\\\\and\\\\y=29(x+40)\ ;\ x>40](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yszpd14au67imbsl43o4ans8m2dtyifxpw.png)
Explanation:
Let the number of hours she works for be 'x'.
Let the number of dollars she will be paid in week be 'y'.
Cost per hour for first 40 hours = $22
Cost per hour for over 40 hours = $29
We need to model the piece-wise equation for her total pay in week.
So, our equation becomes,
![y=22x\ ;\ x\leq 40\\\\and\\\\y=29(x+40)\ ;\ x>40](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yszpd14au67imbsl43o4ans8m2dtyifxpw.png)