Foundation June 2018 Paper 2 Q16
16 Four identical trapeziums are placed on a coordinate grid as shown.

Not to scale
(a) Write down algebraic expressions for the coordinates of point P. [2]
(b) The coordinates of point Q are (16, 13).
Work out the value of \(a\) and the value of \(b\). [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \((a,\ a - b)\) | 2 | B1 for one correct coordinate | Condone eg \(1a\) |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(a = 8\) | 2 | M1 for \(2a = 16\) soi | |
| \(b = 3\) | 2 | M1 for \(2a - b = 13\) soi If 0 scored SC1 for \(a = (8, 0)\) or \(b = (0, 3)\) | Eg their values of \(a\) and \(b\) correct for \(2a - b = 13\) |