2013 A-level H2 Mathematics (9740) Paper 2 Question 10 Suggested Solutions

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

(i)

Model A

Model B

Model C

(ii)

Scatter diagram

(iii)
Since the date points exhibit a curvilinear relationship with a negative gradient and concaving downwards, Model A is the most appropriate.

From the Graphing Calculator, r

(iv)
From the Graphing Calculator, required regression line:

KS Comments:

The first part of this question tests students on their understanding of graphs. Students that have difficulties with this, should attempt to fit in simple values into graphing calculator.