Prelim H2 Math: 2012 Njc

– The 2012 paper would have had a no-calculator section, ensuring students demonstrated algebraic fluency.

Sketch the scatter diagram and compute the product-moment correlation coefficient. (ii) Choose the best model among: (y = ax + b), (y = cx^2 + d), (y = e\sqrtx + f), justifying your choice. (iii) Find the regression equation for the chosen model and estimate (y) when (x = 3.8), commenting on the reliability. 2012 njc prelim h2 math

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