Answer:
To get the slope, we can first mark out any 2 points of the line.
In this case, I will use the point (-2, 0) which will be (x1, y1) and (0, -2) which I will call (x2, y2).
To get the slope, you need to do 
Substitute these values in:

The slope is -1.
sixty-six minus twenty-six is forty.
The cookies because if they have 100°C, after 30 seconds it loses half it‘s heat and now it only has 50°C.
After the next 30 seconds it loses again half the heat so it‘s 25°C.
You can theoretically continue this forever. It‘s exponential decay.
7q^2 - 28 = 0
7q^2 = 28
q^2 = 4
q = 4^0.5
q = +2 / -2