Question

What is the domain & range of
y=2 sqrt. x ?

Answer 1

domain and range is same as the square root function
this function is only vertically stretched by a factor of two so therefore the domain and range is not affected :)

Answer 2

:( my answer was D: all real #s R: all real #s
But I think that is wrong...

Answer 3

ya it is because x cannot be negative, you can't square root a negative unless you want imaginary :/

Answer 4

so because the values of x cannot be negative then the y values cannot be negative either so that leaves you with a domain of [0,infinity) and a range of [0,infinity)