Question

Sania has some money in her account. Every month, she uses the same amount of money from her account to pay for her dance classes. The table below shows the amount of money left in her account after a certain amount of time, in months:
Sania's Savings


Month (x)

Amount (dollars) (y)



0

150


1

110


2

70


3

30



What is the value of the rate of change of the function for this table and what does it represent in this situation?
−$40 per month; the amount of money withdrawn per month
$40 per month; the initial amount of money in the account
−$150 per month; the amount of money withdrawn per month
$150 per month; the initial amount of money in the account

Answer 1

150-110 = 40

rate of change would be -40, the amount withdrawn every month