Foundation June 2019 Paper 3 Q19
19 Make \(x\) the subject of the formula \(y = 2x + 4\) (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(x = \dfrac{y - 4}{2}\) | M1 | for correct first step to rearrange eg \(y - 4 = 2x + 4 - 4\) or \(\dfrac{y}{2} = \dfrac{2x + 4}{2}\) or ambiguously shown eg \(x = y - 4 \div 2\) or answer given as \(\dfrac{y - 4}{2}\) |
| A1 | oe |
Additional guidance
For the M1: May be seen in different equivalent forms but must be carried out, not just intention seen.
Could be shown as a flow diagram but must have correct inverse operations