Question

The graphs below show four functions:

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

please explain so i can understand

Answer 1

I think it could be A or B

Answer 2

f(x)= ?.

Answer 3

5(2)^−x

Answer 4

So at x=o ,f(x)=5

Answer 5

??

Answer 6

im lost

Answer 7

Aand it is exponentially decreasing
So it's A
Not B because B is increasing

Answer 8

Thank you

Answer 9

Welcome