Question

Sally receives a $7,000 gift from her grandmother before going to college. Before leaving she places a down payment on her classes on $500 and then spends $400 dollars a month while at school. Write a function that models the amount she has in the bank per month while she is at college where y is the money in her account and x is the number of months she attends college.

A. y=500x+6500
B. y=-400x + 7000
C. y=400x+6500
D. y=-400x+6500

Answer 1

The amount of money Sally has in the bank per month while she is at college can be modeled by the equation y = 400x + 6500.

Step-by-step explanation:

The amount of money Sally has in the bank per month while she is at college can be modeled by the equation y = 400x + 6500, where y represents the money in her account and x represents the number of months she attends college.

Let's break down the equation:

• The y-intercept is 6500 (a = 6500). This represents the initial amount Sally has in her account before attending college.
• The slope is 400 (b = 400). This represents the amount she spends per month while at school.

By plugging in different values for x, we can calculate the amount Sally has in her account each month while attending college.