## Algebra 1

To find the initial amount, plug 0 in for x: f(x) = 10(0.1$^{x}$) f(0) = 10(0.1$^{0}$) f(0) = 10(1) f(0) = 10 0.1 is the decay factor because this is the value that is attached to the "x" exponent. In other words, this is the value that will determine by how much x decays.