Chapter 10 - Radical Expressions and Equations - 10-5 Graphing Square Root Functions - Practice and Problem-Solving Exercises - Page 630: 54

$y=3\sqrt x$

For $\sqrt 3x$, the square of number times 3 is being found, whereas for $3\sqrt x$, 3 times the square of a number is being found. Taking the square of a value will make it much smaller compared to a square being multiplied by a constant.