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At first let us choose the 5 points
at x = 0, y = 0
The first point is (0, 0)
We will choose a = 1/2
The points are
(-2, -4)
(-1, -1/2)
(0, 0)
(1, 1/2)
(2, 4)
y = a(1 + r)ˣ
a = 15 "<em>initial" means what you started with on the first day</em>
r = 6 <em>the rate it increased is the slope (</em>
y = 15(1 + 6)ˣ
Answer: y = 15(7)ˣ