Question

The graphs below show four functions:

Graph A shows function f of x = 5 * 2 to the power of -x.
Graph B shows function f of x=5 *2 to the power of x.
Graph C shows function f of x =10 to the power of x.
Graph D shows function f of x =10 to the power of -x.

Which graph best shows the function f(x) = 5(2)-x to represent the rate at which a radioactive substance decays?
Graph A
Graph B
Graph C
Graph D

Answer 1

@iGreen

Answer 2

@punksauce @ganeshie8