Jennifer has been saving for college for 57 months. The first month, she saved $11. She was able to save more money each month than the month before. She ended up saving $19,779.00. How much more did she save each month?

How would I solve this? Can someone please walk me through this?

Question

Jennifer has been saving for college for 57 months. The first month, she saved $11. She was able to save more money each month than the month before. She ended up saving $19,779.00. How much more did she save each month?

How would I solve this? Can someone please walk me through this?

danjs · Answer

have you seen or studied a geometric series of numbers,  each term in the series is some constant value times the last tterm. 
I assume in this prob, the "how much more saved each month" is that constant value.


the general form for this is 


y(x) = A * b^x

value y = starting value A * (base) ^ (x months)

danjs · Answer

they give everything but the constant increase each month,  the base of the exponent

19779 = 11 * (b)^57

anonymous · Answer

Well, I was absent to my class for the last few days and just received my makeup work. I don't believe this is a geometric series, but I may be wrong. The formula I have is 
[(av1+avn)/2](n)=total sum

From that I tried...
[11+(11+56(x))]/2 _____ = 19,779 but I couldn't figure out if that was right so far or if so what I should plug into the space.

I tried attaching a picture, but I'm not sure if it went through. Sorry for my late reply, I'm on my phone.