It repeats x values, so it does not pass the vertical line test. By definition, a function can only have one y value for every x value, so if there is more than one x value in a function, its not a function
One example is the least common multiple of 2 and 3 is 6, which is their product.
But the product isn't always the answer because (example 2:) the least common multiple of 6 and 10 is 30 because 6*5=30 and 3*10=30, however 6*10 is 60.
