Question

Please help me

The graphs below show four functions:

Graph A shows function f of x equals 5 multiplied by 2 to the power of negative x. Graph B shows function f of x equals 5 multiplied by 2 to the power of x. Graph C shows function f of x equals 10 to the power of x. Graph D shows function f of x equals 10 to the power of negative 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

@Shalante

Answer 2

@Nnesha

Answer 3

anyone?

Answer 4

@Vocaloid

Answer 5

If it is decaying, is it decreasing or increasing?

Answer 6

decreasing?

Answer 7

Yes, which graphs are decreasing?

Answer 8

A and D

Answer 9

would it be graph A

Answer 10

Yes, it would be Graph A, since the function f(x)=5(2)-x decreases by 1 every time.
Graph A shows more decline than graph D

Answer 11

ok or you could just look at the question and what graph A shows and the look at the function and see they are the same but yes you could do it your way thank you for helping me even though i was a bit slow

Answer 12

and because at x=2, the rate function shows y is decreased by 1
at graph A from x=2 to x=3 it decreased by 1 value.

Answer 13

Yea, no problem.

Answer 14

Graph A shows function f of x equals 5 multiplied by 2 to the power of negative x. f(x) = 5(2)−x

Answer 15

No the answer does not really match the choices on any of it.
It says "which graph best shows".
You just have to match the similar behavior(slopes and decreasing or increasing)

Answer 16

true