Answer:
Step-by-step explanation:
f(x)=4(2)^(-x) is a decreasing exponential function. We know that because of the negative exponent, -x. As x increases, f(x) decreases towards the x-axis, but never touches that axis.
If, however, we have f(x)=4(2)^(-x) - 3, the graph of this function shows the result of translating the entire graph down 3 units. Now, as x increases, f(x) decreases towards the horizontal line y = -3, but never touches that line.
