How to know if lines are proportional

normally they'll be the same length, or you can multiply one line by a number to get the other line

A line is proportional if the y-intercept is at 0,0. So your equation might look like y=4x. But it can't be y=4x+1. Since then the y intercept is at 0,1.

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

happy to

pls mark as brainliest

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.