## anonymous one year ago 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

1. anonymous

2. anonymous

@Shalante

3. anonymous

@Nnesha

4. anonymous

anyone?

5. anonymous

@Vocaloid

6. anonymous

If it is decaying, is it decreasing or increasing?

7. anonymous

decreasing?

8. anonymous

Yes, which graphs are decreasing?

9. anonymous

A and D

10. anonymous

would it be graph A

11. anonymous

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

12. anonymous

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

13. anonymous

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.

14. anonymous

Yea, no problem.

15. anonymous

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

16. anonymous

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)

17. anonymous

true