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Nonlinear Functions

SAT Math· difficulty 3/5

The graph of y=x2y = x^2 is vertically stretched by a factor of 4. Which equation represents the new graph?

  • A

    y=(x+4)2y = (x + 4)^2

  • B

    y=(4x)2y = (4x)^2

  • C

    y=x2+4y = x^2 + 4

  • D

    y=4x2y = 4x^2

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Explanation

Vertical stretch by 4 means multiplying the output: y=4x2y = 4x^2.

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