Answer:
a) y=200x+450
b) y=200(8)+450 = $2050
c) 21 months
Explanation:
a) y=200x+450
200 per month plus her initial deposit of 450
b) y=200(8)+450 = 2050
To see how much she'll have after 8 months, plug in 8 for x
c) 4500<200x+450
4050<200x
20.25<x
x>20.25, so after 21 months since 20.25 is more than 20 months you have to round up to 21