Higher January 2022 Paper 1R Q4
4
(a) Complete the table of values for \(y = x^2 - 4x + 3\) (2)
| \(x\) | \(-2\) | \(-1\) | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|---|---|
| \(y\) | 8 | 3 | 0 |
(b) On the grid, draw the graph of \(y = x^2 - 4x + 3\) for values of \(x\) from \(-2\) to 4 (2)
| Scheme | Marks |
|---|---|
| 15, 0, \(-1\), 3 | B2 |
| (2) |
Notes
B2: for 4 correct values
(B1 for 2 or 3 correct values)
| Scheme | Marks |
|---|---|
| \((-2, 15)\ (-1, 8)\ (0, 3)\ (2, -1)\ (3, 0)\ (4, 3)\) | M1 |
| correct graph | A1 |
| (2) | |
| (4 marks) |
Notes
M1: (dep on B1) ft from (a) for at least 5 points plotted correctly
A1: for a correct graph
(clear intention to go through all the points and which must be curved at the bottom)
Note: If a fully correct graph is shown, but an incomplete table is shown in (a), then award the marks for (a)