Graphing Equations Homework: Identifying Graph to Formula

[3301]

Homework Statement

So I have to do one simple task to identify graph to corresponding formula. I don't know if software is wrong or my approach.

Homework Equations

y =4√x-2 -6[/B]

The Attempt at a Solution

Found zero at x = 2 and when x=6 then y=2 and graph is not showing that. Something I missed? Look at picture. The correct answer is A.

 

[RUber]

Just to be sure, you are looking at $4\sqrt{x-2}-6$?
That does not have a zero at x=2.

 

[3301]

-6 is not in the sqrt

 

[ehild]

Homework Statement

So I have to do one simple task to identify graph to corresponding formula. I don't know if software is wrong or my approach.

Homework Equations

y =4√x-2 -6[/B]

The Attempt at a Solution

Found zero at x = 2

No, that is wrong. Solve the equation $0=4\sqrt{x-2}-6$

and when x=6 then y=2 and graph is not showing that. Something I missed? Look at picture. The correct answer is A.
View attachment 95172

On the y axis, the numbers are above the scales. So the first scale is 2. y=2 at x=6 in figure A.

 

[RUber]

So the zero should be around 4.25, right?

 

[3301]

Ok I got it. It was mine and graphs fault.

 

[HallsofIvy]

Rather than solve an equation I would just notice that f(0) is not a real number and f(2)= -6, not -8. None of the given graphs is correct.

 

[LogarithmLuke]

Rather than solve an equation I would just notice that f(0) is not a real number and f(2)= -6, not -8. None of the given graphs is correct.

I think graph A is correct, the numbers are just placed in a strange way on the y axis.

 

[ehild]

I think graph A is correct, the numbers are just placed in a strange way on the y axis.

Yes, the numbers are shifted one scale. It should look as in the figure.