1. Sketch the graph of the following piecewise functions. 2. 3. 4.3. Using the vertical line test, determine whether or not each of the following graphs represents the graph of a function. 5. 6. 7. 7. State the domain of the following functions a. 𝑓(𝑥 ) = √𝑥 8. b. 𝑔(𝑥 ) = √4−𝑥 𝑥+1