O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2016 · Q82 Marks
y is directly proportional to the square of x. When x = 10, y = 20. Find the value of y when x = 6.
- (a)y is directly proportional to the square of x. When x = 10, y = 20. Find the value of y when x = 6.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2016). The mark or mark type is shown in brackets.
- [2*] 7.2 or 36/5 oe
- M1 for 20 = 10^2 k oe or y/10^2 = y/6^2 oe
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