Answer:
Step-by-step explanation:

Y = - 20x + 100
Slope is -20, y-intercept is 100.
Confusing question but I would get 0, as if you have 4cm, that squared = 16cm^2. Therefore if it were increasing anymore, then you would not be able to get a value of 16.
Answer:
-2-5
Step-by-step explanation:
-2-5 = -7
2-5 -3
-5+2
= -3
5+(-2) = -3
Here. This is the graph you wanted. The underside is shaded by the way.