You should KNOW 

        1.  The definition of function as given in JIT p.50 including the ideas of domain and range.   
        2.  That a function can be specified by a table or a verbal rule as well as by an algebraic expression. 
        3.  That the graph of a function   f  is the the set of points (x,y) for which 
y = f(x)  and how to identify something as the graph of a function.  
        4.  How to read the values of a function from a graph using 3. 
        5.  How function notation works, and the idea of a "dummy variable" as in FP p. 49.
        6.  What average rate of change is, and how this is expressed as a difference quotient.    How to simplify difference quotients, and how these are related to the idea of slope

A more detailed summary of what you should know can be found in the page Functions in General


You should be ABLE TO

         1.  Given f(x), to find f(??) where ?? can be a number or an expression that might involve another variable, e.g. f(3.2), f(5t+3).
         2.  Read function values from a graph of a function.
         3.  Determine domains and ranges for simple functions.
         4.  Calculate, simplify and interpret difference quotients.