Answer: 
Step-by-step explanation:
First, it is needed to determined the values for x = 1 and x = 2:

The sign change within the interval is the most sound evidence of the root existence. According to the Intermediate Value Theorem, there is a number
such that
. Another finding is that
is closer to 1 than to 2.
![c = a + \frac{b-a}{f(b)-f(a)}\cdot[f(c)-f(a)]](https://tex.z-dn.net/?f=c%20%3D%20a%20%2B%20%5Cfrac%7Bb-a%7D%7Bf%28b%29-f%28a%29%7D%5Ccdot%5Bf%28c%29-f%28a%29%5D)
![c = 1 + \frac{2-1}{4-(-1)}\cdot[0-(-1)] \\c = 1.2](https://tex.z-dn.net/?f=c%20%3D%201%20%2B%20%5Cfrac%7B2-1%7D%7B4-%28-1%29%7D%5Ccdot%5B0-%28-1%29%5D%20%5C%5Cc%20%3D%201.2)
I believe it might’ve made 2,400 books, because if you divide 70 from 1680 you get 24, meaning it’s pressing about 24 books per hour, if it’s printing twice that you would multiply 48 by 50 and get 2,400.
If there is a decrease on y then that’s the answer