Graphs 7
3 marks · EasyComplete the table of values for the equation y = x^2 - x - 2.
| x | y |
|---|---|
| -2 | |
| -1 | |
| 0 | |
| 1 | |
| 2 |
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
Must show: -2 for x=-2 (y=4), -1 for x=-1 (y=0), 0 for x=0 (y=-2), 1 for x=1 (y=-2), 2 for x=2 (y=0)
Common mistakes: Arithmetic errors; Wrong substitution
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Correctly substitutes at least one value for x into y = x^2 - x - 2.
A1 · 1 mark · Three or four values correct.
A1 · 1 mark · All five values correct.
Worked solution
| x | y |
|---|---|
| -2 | 4 |
| -1 | 0 |
| 0 | -2 |
| 1 | -2 |
| 2 | 0 |