Graphs 4
3 marks · NormalFor the quadratic equation , complete the table of values for .
(a)
[3 marks]
| x | -2 | -1 | 0 | 1 | 2 | 3 |
|---|---|---|---|---|---|---|
| y |
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(a) y: (-2, -6), (-1, -6), (0, -4), (1, 0), (2, 6), (3, 14)
Common mistakes: Incorrect substitution; Arithmetic errors
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Correct substitution for one value of x.
A1 (a) · 1 mark · Correctly completes three or four y-values.
A2 (a) · 1 mark · All y-values correct.
Worked solution
Substitute each value of x into y = x^2 + 3x - 4:
| x | -2 | -1 | 0 | 1 | 2 | 3 |
|---|---|---|---|---|---|---|
| y | -6 | -6 | -4 | 0 | 6 | 14 |