Model the data using an exponential function f(x) = Abx. x 0 1 2 f(x) 400 1,200 3,600 f(x) =

The half-life of plutonium-244 is 80,000,000 years. Find function gives the amount of carbon-14 remaining as a function of time, measured in years.

What happens to an exponential function as the values of x decreases? Will the graph ever cross the y -axis? Explain.