what's the solution to a math question like this?

Question

y= square root of x-1
meaning x-1 is within the sq root symbol.

Answer 1

If you need a positive result, then y will only be a real number when x - 1 is >= 0.

x - 1 >= 0
x >= 1

So x must be greater or equal to 1.

Answer 2

y = sq rt (x-1)
solutionis to find value for x
y^2 = x-1
so x= y^2+1

Answer 3

it is a picture.... at x=1 is where it starts and curves upward at an angle ex.... (1,0), (5,2) , (10,3)