Slope of N - t graph of radioactive decay

[songoku]

Homework Statement

Please see below

Relevant Equations

$N=N_o e^{-\lambda t}$

I am not really sure how to interpret the slope. The equation is:

$$N=N_o e^{-\lambda t}$$

If the graph is N against t, then what is the slope?

I can find the slope if the graph is log:
$$log N=log N_o -\lambda t$$

So if the graph is log N against t, then the slope is $-\lambda$

But if the graph is N against t, I have no idea what the slope is.

Thanks

 

[Orodruin]

Are you familiar with derivatives?

 

[songoku]

Are you familiar with derivatives?

Yes. I understand your hint.

Thank you very much Orodruin