2015 A-level H2 Mathematics (9740) Paper 2 Question 10 Suggested Solutions

By KS Teng

All solutions here are SUGGESTED. Mr. Teng will hold no liability for any errors. Comments are entirely personal opinions.

(i)
Graph to be inserted
(ii)
(a) r \approx -0.9807 (4 DP)
(b) r \approx -0.9748 (4 DP)
(c) r \approx -0.9986 (4 DP)

(iii)
Using GC, P = -0.14686 \sqrt{h} + 34.78895
\therefore, P = -0.147 \sqrt{h} + 34.8 (3 SF)

(iv)
\therefore, P = -0.147 \sqrt{3.28h_{metres}} + 34.8

\therefore, P = -0.266 \sqrt{h_{metres}} + 34.8 (3 SF)

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