To start with the general form of an exponential equation is given as. Or how about finding the common ratio and common difference. Exponential functions tell the stories of explosive change.
For exponential functions the basic parent function is y2x which has a asymptote at x0 but if it is shifted up or down by adding a constant y 2x k the asymptote also shifts to xk.
Instead y t decreases. Think about linear equations and exponential equations. And when it comes to linear and exponential growth or decay some of the principles actually overlap. Xt x 0 1 r100 t.