# Graphing equation

1. Feb 1, 2016

### 3301

1. The problem statement, all variables and given/known data
So I have to do one simple task to identify graph to corresponding formula. I dont know if software is wrong or my approach.

2. Relevant equations
y =4√x-2 -6

3. 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.

2. Feb 1, 2016

### RUber

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

3. Feb 1, 2016

### 3301

-6 is not in the sqrt

4. Feb 1, 2016

### ehild

No, that is wrong. Solve the equation $0=4\sqrt{x-2}-6$
On the y axis, the numbers are above the scales. So the first scale is 2. y=2 at x=6 in figure A.

5. Feb 1, 2016

### RUber

So the zero should be around 4.25, right?

6. Feb 1, 2016

### 3301

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

7. Feb 2, 2016

### HallsofIvy

Staff Emeritus
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.

8. May 22, 2016

### LogarithmLuke

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

9. May 22, 2016

### ehild

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