x = -2 and x = 5
Compared to the second graph equation presented, when graphed, the first equation is more narrow while the second one is expanded by a factor of 1/2 (or so it seems).
My tip to you is to graph these to get a good visual, these will allow you to find the answer to both questions presented.
Hope this helps!
Answer:
The standard deviation is 9.34
Step-by-step explanation:
First we need to find mean of the sample:

Standard deviation will be like below:

Subtract 7 from both sides
-2m = 11 - 7
Simplify 11 - 7 to 4
-2m = 4
Divide both sides by -2
m = -4/2
Simplify 4/2 to 2
<u>m = -2</u>
6/4 = 1.5 liters of pain per brother