Pls answer #3

2. Sketch a graph that is a function. Explain how you know it is a function. 3. Sketch a graph that has a domain of D : {r ER} and a range of R : {y ER, y > 2}. Can you draw one that is a function, and one that is not? 4. Write a function using function notation. Provide two other representations of the function. Justify your