SOLUTION: Determine whether the equation defines y as a function of x. x + y = 9

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Question 634823: Determine whether the equation defines y as a function of x.
x + y = 9

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Solve for y to get

Since plugging in any x value gives you one and only one y value, this means that y is definitely a function of x.

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