Trigonometry
Which of the following statements correctly describes the procedure for obtaining the graph of y = 20 sin x from the graph of y = sin x?
Translate the graph of y = sin x by 20 units to the right.
Translate the graph of y = sin x by 20 units upward.
Stretch the graph of y = sin x vertically by a factor of 20.
Compress the graph of y = sin x vertically by a factor of 20.