The function graphed with a solid line is the parent function, y=f(x). Which of the following describes the transformed function, y=4f(x), which is shown with a dotted line?

The parent function has been vertically compressed by a factor of 4.

The parent function has been vertically compressed by a factor of 1/4..

The parent function has been vertically stretched by a factor of 1/4.

The parent function has been vertically stretched by a factor of 4.

The correct answer is: The parent function has been vertically stretched by a factor of 4.