The first 3 are it on the first pic
Professionally: dealing with a change of a co worker and having to readjust
Personally: Moving and having to switch schools and make new friends
One reason is that genetic differences make us more or less sensitive to the chemical molecules in different foods. Our genes can therefore influence how sensitive we are to bitterness or sweetness among the other tastes. Sounds also influence of taste perception. If your mom LOVED pretzels then you would like them too because it comes from generation but this can sometimes not be true. My mom loves oysters and I absolutely dislike them
For this case we have that by definition, a linear function is of the form 
If we have that a and b are linear functions, then they are of the form:

If we multiply them we have: (Applying distributive property)

That is, we get a quadratic function.
Answer:
