The half-life of a substance is the time it takes for half of the substance to decay. The exponential function representing half-life is f(x) = A (1/2)^x where A is the initial amount of the substance and x represents the time for decay. The half-life of the substance will depend on the initial amount of substance you have. In this activity, you will experience this formula in action. Write a half life function based on;
ln y = -0.62x + 3.642

Question

The half-life of a substance is the time it takes for half of the substance to decay. The exponential function representing half-life is f(x) = A (1/2)^x where A is the initial amount of the substance and x represents the time for decay. The half-life of the substance will depend on the initial amount of substance you have. In this activity, you will experience this formula in action. Write a half life function based on; 
ln y = -0.62x + 3.642