Which is the correct answer for the answer below?*

Question

Y=√x+2 is a Function, one-to-one, or neither?

Answer 1

It's a function because it passes the vertical line test.

To do a vertical line test, you need to draw a vertical line (up and down) through the graph. If it DOESN'T hit the graph in more than one spot. It's a function.

Answer 2

that's like y^2 = x + 4sqrx + 4, if you square both sides, but that introduces values not in the original equation.

for every x there are two y values, unless you treat sqrx as just the positive value, then you get the top half of a parabola that opens to the right. With just the top half of the parabola, it's a function, since when you draw a vertical line through it, it only cuts the graph one time. It's one to one, as for every value of y there is only one value of x, and vice versa.

sqrx is just the positive square root, and does not include the negative square root,

Answer 3

It is a function