2. Objective: to identify the domain and range of functions and begin to use function notation
3. This is the graph of a function as there is only one value of y for each value of x.
4. This is NOT the graph of a function as there are two or three values of y for some values of x.
5. Domain and Range The set of numbers x for which a function y = f(x) is defined is called the domain of the function. The set of numbers y for which a function y = f(x) is defined is called the range of the function. Domain: Range:
6. Function Notation This means f is the function whose domain is the set of real numbers which turns any input x into the output 2x – 10. This means g is the function whose domain is the set of real numbers excluding 2 which turns any input x into the output 3 ÷ (x – 2).
8. Plenary The functions f and g are defined as follows: Given that f(2) = 11 and the graph of g is a tangent to the graph of f at the point where x = 1, find the values of A, B and C. Hence, state the range of f.