When graphing exponential decay, it is always a good idea to make a table of values and you could look for at least 5 points that you can use to make the graph. In the table below, we use 6 points.
It is also a good idea to choose both negative and positive values for x, especially numbers that are opposites. For example, notice how we chose x = -1 and x = 1.
In the graph below, each square along the x-axis represents 1 unit and each square along the y-axis represents 10 units. Notice that for an exponential decay, as x increases, y decreases exponentially or decreases rapidly.