Question

How do you use the graph of `y=sqrtx` to sketch the graph of `f(x)=-9sqrtx`?

Answer 1

The `-` means uside down, and the `9` means everything is `9` times greater.

Explanation:

I'll just show you the graph:
graph{-9sqrtx [-64.2, 173, -73.5, 45.2]}
as compared to `sqrtx` (same scale)
graph{sqrtx [-63.2, 174, -56, 62.7]}