Final answer:
Vertical stretching occurs when a constant is multiplied to the radical function, which stretches the graph vertically. Horizontal stretching occurs when a constant is multiplied to the input variable, which stretches the graph horizontally.
Step-by-step explanation:
Vertical and horizontal stretching affect the graph of a radical function in different ways. Vertical stretching occurs when a constant is multiplied to the radical function, which stretches the graph vertically. For example, if we have the function y = √x and multiply it by 2, the graph will be stretched vertically and become y = 2√x. Horizontal stretching, on the other hand, occurs when a constant is multiplied to the input variable, which stretches the graph horizontally. For example, if we have the function y = √x and multiply x by 2, the graph will be stretched horizontally and become y = √(2x).