Hi Dalia;
Thank you for the update. Let me try again.
h(x) = √(x) +6
The first issue to consider is that a figure which must be squarerooted, cannot be negative. Henceforth, zero is the smallest number which can be square rooted.
√(x) must be equal or greater than zero.
Henceforth, 0 is the lowest number on the xaxis.
There is nothing limiting the xaxis in the positive direction.
The domain of x is...
0, infinity.
h(x)=y
This is the range, also known as the yaxis.
h(x) = √(x) +6
y=√(0) +6
y=6
The line begins on the yaxis, at its point of 6.
There is nothing limiting the yaxis in the positive direction.
Henceforth, the range is...
6, infinity
The first point of the line is
0, 6
There is no last point.
The line proceeds to the right, to infinity.
Please let me know if I can do anything more to help.
10/1/2013

Vivian L.