Is this proportional 12/15=3/5

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.  

two? xd

step-by-step explanation:

okey so the slope is -3/5 and the y -intercept is 7/5

hope this if needed hmu