On a piece of paper, graph y< - 1/2 x + 1

Image below

Step-by-step explanation:

Make sure you draw it with a dotted line.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval