Which graph represents the function?
f(x)= Sqrt x-1
The second to last one. It has the correct x-intercept (1,0) and has the correct slope.
I think you mean
f(x)= Sqrt (x-1) becasue none of them are f(x)= Sqrt x-1
f(x)= Sqrt (x-1)
you know Sqrt (4) = 2
f(x)= Sqrt (5-1)=sqrt(4)
so lets think about x=5
f(5)= sqrt(5-1) = sqrt4 = 2
So (5,2) must be a point on the graph.
So which is the correct graph?