Higher January 2020 Paper 2R Q15
15
(a) Complete the table of values for \(\;y = x^2 - \dfrac{x}{2} - 3\) (2)
| \(x\) | −3 | −2 | −1 | 0 | 1 | 2 | 3 |
|---|---|---|---|---|---|---|---|
| \(y\) | 7.5 | −2.5 | 4.5 |
(b) On the grid, draw the graph of \(\;y = x^2 - \dfrac{x}{2} - 3\;\) for values of \(x\) from −3 to 3 (2)
| Scheme | Marks |
|---|---|
| 2, −1.5, −3, 0 | B2 |
| (2) |
Notes
B2: B1 for 2 or 3 values correct
| Scheme | Marks |
|---|---|
| M1ft | |
| A1 | |
| (2) | |
| (4 marks) |
Notes
M1ft: At least 5 points plotted correctly ft from table dep on B1 in part (a)
A1: For correct smooth curve.