Final answer:
Without the total length of fencing required and the number of students in Ms. Brown's class, we cannot calculate the additional amount of money each student needs to raise.
Step-by-step explanation:
To calculate how much more money per student Ms. Brown's class needs to raise to completely fence in the playground, we need additional information such as the total length of the fencing required and the number of students in Ms. Brown's Class. Without these details, we cannot provide a step-by-step explanation or an equation similar to the examples given like for the tutoring school, Emma's Extreme Sports, and the statistics instructor. In those examples, equations take the form y = fixed cost + variable cost * x, where x represents a variable such as the number of tutoring sessions, the number of classes, or the number of students.
Once the total cost of the fence and the number of students are known, divide the total cost of the fencing by the number of students to find out how much more each student needs to contribute. If the fence costs $15 per yard, for example, and the playground requires 100 yards of fencing, the total cost of the fence would be $1500.
If Ms. Brown's class already raised $400, an additional $1100 is needed. Assuming there are 22 students in the class, each student would need to raise $1100 / 22, which is an additional $50 per student. However, without the exact numbers, we cannot provide an accurate answer.