We say 'y is a function of x', if each value of the variable x corresponds (maps to) to a unique (exactly one) value of y. If y is a function of x, we call x 'independent variable' and y 'dependent variable', since the value of y depends uniquely on the value of x. The set of all possible values of the independent variable x is called the domain of the function. Note: x and y are the common letters we use to represent variables. You may choose other letters, depending on the question. For instance, weight W is a function of a person's age, A. (a) Give an example of a function. (b) Explain what the independent variable is, what the independent variable is and choose appropriate letters to represent them. Explain why the relationship is a function. (c) What is the best way to represent your function: graph, table of values, or formula. You must start a thread before you can read and reply to other threads