Answer
Please see the graph.
Work Step by Step
The three budget constraint curves ($BC_{1}$, $BC_{2}$, and $BC_{3}$) and the indifference curves are for when Sarah earns 6 dollars per hour, 8 dollars per hour, and 10 dollars per hour, respectively.
When paid 6 dollars an hour, Sarah will work $L_{6}$ hours. When paid 8 dollars an hour, Sarah will work $L_{8}$ hours. When paid 10 dollars an hour, Sarah will work $L_{10}$ hours.
Since the labor supply curve is upward sloping when the wage is between 6 and 8 dollars per hour, the number of hours Sarah works decreases when Sarah's wage increases from 6 dollars per hour to 8 dollars per hour. However, since the labor supply curve is downward sloping when the the wage is between 8 and 10 dollars per hour, the number of hours Sarah works increases when Sarah's wage increases from 8 dollars per hour to 10 dollars per hour.
