It helps you narrow down to a smaller answer for example there is pi, (3.14159265359) and there is more and more to that number. It is now estimated to 3.14 because it would be almost impossible to work with pi if it wasn't estimated
For a you will see a bar graph and the dependent o think would be bird species
The answer would be: There were 2 chefs and 13 customers.
N+14=17. n=3. So the missing number is 3.
