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Advanced Math / Nonlinear functions Difficulty: Easy

The y -intercept of the graph of y = x 2 + 31 in the xy-plane is 0,y. What is the value of y ?

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Explanation

The correct answer is 31 . It's given that the y-intercept of the graph of y = x 2 + 31 in the xy-plane is 0,y. Substituting 0 for x in the given equation yields y=02+31, or y = 31 . Thus, the value of y is 31 .