we are given
number of branches is
![B=y-3](https://tex.z-dn.net/?f=B%3Dy-3)
number of leaves on each branch
![n=2B^2-B](https://tex.z-dn.net/?f=n%3D2B%5E2-B)
the average number of leaves = (number of branches)*(number of leaves on each branch)
so, we can plug values
we get
![f(y)=B*n](https://tex.z-dn.net/?f=f%28y%29%3DB%2An)
now, we can plug values
![f(y)=(y-3)*(2(y-3)^2-(y-3))](https://tex.z-dn.net/?f=f%28y%29%3D%28y-3%29%2A%282%28y-3%29%5E2-%28y-3%29%29)
now, we can simplify it
............Answer
<em>The answer is "y > x-2 and y < x + 1"
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<em>Step-by-step explanation:
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<em>In the given question the last choice, that is "y > x-2 and y < x + 1" which can be defined in the following diagram.</em>
Social Studies rate, S = 30/ 1.5 = 20pages/hr
Novel rate, N = 150/2 = 75pages/hr
Novel rate as a % of Social Studies rate...
N/S × 100% = 75/20 × 100% = 375%