Which best describes the effect on the graph of f(x) = 2x + 3 if the y-intercept is changed to -6?

Any of the following answers are correct:

-The function moves down to -6 on the y axis

-The function moves down 9 points from its original position on the y axis

-The function performs a vertical shift, down to -6 on the y axis

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.