Hi, I need some help understanding this question.

x is the amount spent on advertising, in thousands of dollars.

Equation: P = -5x^{2 }+550x -5000

The question asks for the x at P(x) = 0. which I have solved

x_{1}=10 and x_{2}= 100

The part I need help with is this:

Describe the relationship between your solution and this graph of the corresponding relation.

y-axis = Profit ($1000)

x-axis = x ($1000)

I do not understand what its asking me, the solution I have matches the graph. is this some sort of a trick question?