1. The like graph is dated day by day. To make it easier you could maybe do two days at a time. For example, 24- sep- 26- sep. This will decrease less confusion. To graph it correctly just make the line for the higher numbers taller and for the smaller, shorter.
2. I gave you the answer for this one it the last sentence . :)
Answer: Point slope form is y-y1=m(x-x1)
Step-by-step explanation:
Here y1=4
x1=-11
m i.e slope=-2
And there you go.
Time is -b/2a, which is 3.
f(3) = 24 = maximum congestion
This is a right triangle. We know that

Therefore,

Now we have:


Rewrite the system of equations in matrix form.

This system has a unique solution
so long as the inverse of the coefficient matrix
exists. This is the case if the determinant is not zero.
We have

so the inverse, and hence a unique solution to the system of equations, exists as long as m ≠ -4.