Analyzing Departures from Linearity

AP Statistics· difficulty 3/5

A plot of sqrt(y) against x is approximately linear.

x sqrt(y)

The original relationship between y and x is best described by:

  • A

    A power model with negative b

  • B

    An exponential model

  • C

    A logarithmic model

  • D

    A quadratic-like model: y is approximately (a + b x)^2

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Explanation

If sqrt(y) = a + b x is linear, then y = (a + b x)^2, a quadratic-like model.

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