exponential formula (y=c(a)^x) fill in blanks
x y
0 ?
5 40
9 1200
15 ?
40 = c*a^5
1200 = c*a^9
30 = a^4
a = 2.34
40 = c (2.34)^5
40 = c*70.16
c = 0.570
y = 0.570*2.34^x
Use that to fill in the blanks.
When x = 0, y = 0.570