To find the value of y, we start with the equation of the graph given as y = 4x. If we say 2y lies on this graph, we can set up the equation:
2y = 4x
Next, we can solve for y by dividing both sides of the equation by 2:
y = 2x
Thus, if 2y lies on the graph of y = 4x, we find that y is equal to 2 times x. This result shows the relationship between y and x for any point on that specific line described by the equation y = 4x.