16 because 8 rooms have 8-11, 5 rooms have 4-7, and 3 rooms have 0-3 guests.
Answer:
1) Your slope should be 1/5
2) Your slope should be 
3) Your slope should be 1/2
I hope this helps! : )
Y-6=2x+6
y=2x+12
Slope is 2
A function is increasing if it "points upwards".
Think that you have two inputs
(think of them as being very close to each other). A function
is increasing if

So, smaller input, smaller output.
So:
- In the first segment on the left, the function is decreasing: if you move with little steps rightwards, the output will get smaller and smaller (the function points to the right bottom)
- In the second segment, the line is constant (it's horizontal). This means that even if you consider a larger input, the output reimains the same
- In the third segment, the function is increasing: if you consider a larger input, the output will be larger as well: the function points to the top right.
- In the fourth segment, the function is decreasing again (look at the first bullet point)
So, the function is increasing in the third segment, which is delimited by

(X+5)²=4/4
X+5=1, X+5=-1
X=1-5 X=-1-5
X=-4 X=-6