X + 14 = 12
x + 14 - 14 = 12 - 14
x = 12 - 14
Options B and C are related to the given equation.
Answer:
Dependent variable: time(months) or 
Independent variable: 6
Step-by-step explanation:

(h=height)
The line is right in the middle of 100 and 110 degrees so the answer should be 105 degrees. This tool is called a protractor. :)