Early in the twentieth century, an intelligence test called the Stanford-Binet Test (more commonly known as the IQ test) was developed. In this test, an individual’s mental age M is divided by the individual’s chronological age C and then the quotient is multiplied by 100. The result is the individual’s IQ. IQ(M, C) = M C × 100                                                                                      Find the partial derivatives of IQ with respect to M and with respect to C. Evaluate the partial derivatives at the point (12, 10) and interpret the result.

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Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
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Early in the twentieth century, an intelligence test called the Stanford-Binet Test (more commonly known as the IQ test) was developed. In this test, an individual’s mental age M is divided by the individual’s chronological age C and then the quotient is multiplied by 100. The result is the individual’s IQ. IQ(M, C) = M C × 100                                                                                      Find the partial derivatives of IQ with respect to M and with respect to C. Evaluate the partial derivatives at the point (12, 10) and interpret the result.

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