Watch the video on “What Are Functions?” and answer:

• a)  In mathematics, what is a “function”?
  • b)  What is a “set”?
  • c)  What are the names of the two sets related by a function?
  • d)  What is a “function table?
  • e)  How do we calculate the value of the function when we input a value for “x”?
  • f)  What is the important limitation to functions?
  • g)  Is y = x + 1 a function? Why?
  • h)  What means “f(x)”? Why don’t we simply use “y”?