VERTICAL LINE TEST GRAPHS can represent functions. The ____________________ ___________ __________ can help you test whether or not a graph is a function. Remember: There can only be ONE y value for each x value. If you run your pencil across two points vertically above one another, it is NOT a function! Determine which graphs are functions VERTICAL LINE TEST

To graph each function by creating a table of values of first: Step 1: Choose values for x Step 2: Evaluate the function at Step 3: Plot the points on a (it is best to choose two these values and complete coordinate plane and negative values, zero, the input-output table. graph the function. and two positive values). 1. x y = 2x 3. x y = - x -2 -1 1 2 2. x y = x - 3 4. x

Make an Input-Output Table from the given graph: Step 1: Find where the graph Step 2: Create an Input-Output Step 3: Find the pattern in the crosses at lattice points. Table from those ordered pairs. table to create a function rule. Draw those dots in larger. 1. x y 3. -2 -1 1 2 2. 4.