Final answer:
Whitney's hourly rate from dog walking is $16, calculated from the provided information. After 3 hours, she will have earned $48, making answer A correct.
Step-by-step explanation:
The student asked how much money Whitney will have earned after 3 hours of walking dogs, given that she earned a total of $32 for 2 hours of work. This relationship is directly proportional, meaning that the amount of money she earns is directly related to the number of hours she works.
To solve this, we can calculate Whitney's hourly rate by dividing the total amount she earned ($32) by the total number of hours she worked (2 hours). This gives us an hourly rate of $16 per hour ($32 ÷ 2 hours = $16/hour).
If Whitney continues to walk dogs for a total of 3 hours, we can then multiply her hourly rate by the total number of hours to find out how much she will have earned. This results in $16/hour × 3 hours = $48. Therefore, answer A is correct.