Question

will give medal !!!!!

The functions f(x) and g(x) in the table below show Kim’s and Ben's savings respectively, in dollars, after x days. Some values are missing in the table:
x(years) 1 2 3
g(x) = 3x Kim’s savings in dollars
3 9
f(x) = 3x + 5
Ben’s savings in dollars 8 11

Which statement best describes Kim and Ben's savings in the long run?

Answer 1

Note that Kim´s savings are multiplied by 3 each week
whereas Ben´s increase by 3 dollars each week.
Kim´s savings wil increase much faster than Ben´s.

Answer 2

for KIm the savings form a geometric sequence
with common ratio 3
Ben´s form an arithmetic sequence common difference 3.

Answer 3

In the long run Kim will save much more that Ben
Kims savings can be described as exponential