Answer:
6√x
Step-by-step explanation:
9√x - 3√x = 6√x
Answer:
The vertex of the quadratic function is:

Step-by-step explanation:
Given the function

As the vertex of the form
is defined as:

As the quadratic function of parabola params are

so



Putting
to determine 




Therefore, the vertex of the quadratic function is:

I just wrote it out so hope this helps :)
In a simple Cartesian plane, there are two axes, y-axis that is drawn vertically and the x-axis that is drawn horizontally. this problem asks for the an example of horizontal stretch. Thus, the example of horizontal stretch is the stretching of the graph away from the x-axis. Thus, the answer is letter C.