Foundation June 2017 Paper 2 Q26
26
(a) Complete the table of values for \(\qquad y = x^2 - x - 2\) [2 marks]
| \(x\) | \(-2\) | \(-1\) | \(0\) | \(1\) | \(2\) | \(3\) |
| \(y\) | \(-2\) | \(-2\) | \(4\) |
(b) Draw the graph of \(\qquad y = x^2 - x - 2 \qquad\) for values of \(x\) from \(-2\) to 3 [2 marks]
| Answer | Mark | Comments | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B2 | B1 1 or 2 values correct |
| Answer | Mark | Comments |
|---|---|---|
| 5 or 6 points plotted correctly | M1 | Correct or ft their table in (a) Tolerance of \(\pm 1\) small square Points can be implied by graph passing through them |
| Correct smooth parabolic curve and \(y\)-coordinate of minimum point in the range \(-2.5 \leqslant y \leqslant -2.1\) | A1 | Tolerance of \(\pm 1\) small square for the six correct points from the table No further tolerance for the minimum |
Additional guidance
Tolerance of \(\pm 1\) small square means it is on the edges of or within the shaded area | |
| Ignore extra points plotted | |
| If their table in (a) has points that are beyond the grid these points will not be able to be plotted correctly | |
| Ignore any curve drawn for \(x \lt -2\) or \(x \gt 3\) | |
| Curve passing through all correct points within tolerance | M1A1 |
| Ruled straight lines | A0 |