# Describe the relationship between your solution and this graph

• Feb 13th 2013, 03:52 PM
SohailS
Describe the relationship between your solution and this graph
Hi, I need some help understanding this question.

x is the amount spent on advertising, in thousands of dollars.
Equation: P = -5x2 +550x -5000
The question asks for the x at P(x) = 0. which I have solved
x1=10 and x2 = 100

The part I need help with is this:
Describe the relationship between your solution and this graph of the corresponding relation.
Attachment 27006
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?
• Feb 13th 2013, 05:01 PM
chiro
Re: Describe the relationship between your solution and this graph
Hey SohailS.

I don't know what its asking either, but you can say that the solution you got matches with the graph of the profit function.

You should ask your teacher to be more specific in the future.
• Feb 13th 2013, 05:03 PM
SohailS
Re: Describe the relationship between your solution and this graph
Alright thanks. I was just going to write that as well.
• Feb 14th 2013, 07:06 AM
emakarov
Re: Describe the relationship between your solution and this graph
Quote:

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

I think the relationship is that the graph of P(x) intersects the x-axis at the points whose first coordinates are the numbers you found, i.e., you found the x-intercepts of P(x).

I agree that the question is vague.