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Slope Fields

AP Calculus AB· difficulty 2/5

For dy/dx=x−ydy/dx = x - y, where on the plane is the slope <strong>zero</strong>?

  • A

    y=xy = x

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  • B

    y=0y = 0

  • C

    y=−xy = -x

  • D

    x=0x = 0

Explanation

x−y=0⇒y=xx - y = 0 \Rightarrow y = x. Slopes are zero along this line.

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