<span><span>The average rate of change formula is basically the slope formula, where you plug in: f(b)-f(a)/b-a. Then plug in the numbers. [f(0)=1,f(3)=7)]. So, 7-1/3-0. 6/3 is 2 so the average rate of change is 2. And that makes sense because the average rate of change is always the slope, and the slope is 2.</span></span>
Answer:

Step-by-step explanation:
Step 1. Calculate the number of capsules
Marilyn takes 2 capsules per day

Step 2. Convert capsules to milligrams
There are 20 mg in each capsule.

Answer:2.91666666667
Step-by-step explanation:
The general equation of line with the slope "m" and passing points (a,b) is :
y - b = m (x -a)
In the given question:
Slope m = -2, passing points (a,b) = (4,-4)
Substitute the value of a = 4, b = -4 in the general equation of line

The equation with the slope -2 and passing points (4,-4) is 2x + y = 4
Answer : 2x + y = 4