Higher November 2018 Paper 5 Q9
9 Rearrange this formula to make \(y\) the subject.
\[x = y^2 + 7\][2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(y = [\pm]\sqrt{x - 7}\) | 2 | M1 for \(x - 7 = y^2\) or for answer \([\pm]\sqrt{x - 7}\) or for correct step to answer after incorrect first step shown | e.g. answer \(y = \sqrt{x + 7}\) after 1st step is \(y^2 = x + 7\) |