Higher November 2023 Paper 2 Q19
19 \(A\) is directly proportional to \(B^4\)
The value of \(B\) is doubled.
Pete thinks that the value of \(A\) will be 8 times bigger because \(4 \times 2\) is 8
Is he correct?
Tick a box.
- Yes
- No
Give a reason for your answer. [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| No and valid reason | B1 | eg no and 16 times bigger |
Additional guidance
| No and It is to the power 4 not times by 4 (unclear that ‘it’ is 2) | B0 |
| No and \(2^4 = 16\), \(4^4 = 256\), \(16 \times 8 = 128\) | B1 |
| No and \(2^4 = 16\), \(4^4 = 256\) (using \(B = 2\) as an example and does not show that 256 is not \(16 \times 8\)) | B0 |
| No and \(2^4 = 16\) (shows the correct calculation) | B1 |
| No and \((2B)^4 = 16B^4\) | B1 |