Foundation November 2022 Paper 3 Q13
13 Luke wants to make a number machine so that \(\quad y = 5x + 3\)
Here is his attempt.
What mistake has he made? [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| Valid explanation | B1 | eg it should be \(\times 5\) then \(+ 3\) or he has done \((x + 3) \times 5\) |
Additional guidance
| Ignore irrelevant statements alongside correct statements, unless contradictory eg it should be \(\times 5\) then \(+ 3\) and he should change his equation | B1 |
| Do not ignore incorrect statements alongside a correct statement eg it should be \(\times 5\) then \(+ 3\) and \(x\) and \(y\) should be swapped | B0 |
| The operations are in the wrong order | B1 |
| Misplacing the 3 and 5 with their operations | B0 |
| The order is wrong | B0 |
| \(+ 3\) and \(\times 5\) are in the wrong order | B1 |
| 3 and 5 are the wrong way round | B0 |
| \(\times 5\) needs to go before the \(+ 3\) | B1 |
| He has added the 3 first when he should have multiplied by 5 | B1 |
| \(\times 5\) needs to go first | B1 |
| \(\times 5\) needs to go in the first box | B1 |
| He has put the \(+ 3\) in the wrong place (condone) | B1 |
| He has put the numbers in the wrong squares | B0 |
| He has added 3 to \(x\) and not multiplied by 5 | B1 |
| He should have multiplied by 5 first (before adding 3) | B1 |
| He should have multiplied before adding | B0 |
| He has made \(x + 3 \times 5 = y\) | B0 |
| He has made \(3x \times 5 = y\) | B0 |
| Swap the input and the output boxes | B0 |