Evaluate an Exponential Function at Four x-values

The given function is f(x)=2^(3-x), an exponential function with base = 2. This function is evaluated when x = -2, 3, 4, and 7. The following rules for exponents are used: positive exponents, zero exponents, and negative exponents.

Timestamps:
0:00 Introduction
0:23 f(-2)
1:22 f(3)
2:10 f(4)
2:55 f(7)