4MA0 Foundation January 2015 Paper 2 Q16
16 On the grid, draw the graph of \(\;y = 3x - 4\;\) for values of \(x\) from –2 to 3
(4)
| Scheme | Marks | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Answer: \(y = 3x - 4\) drawn from \(x = -2\) to \(x = 3\) | B4 | ||||||||||||||
| (4) | |||||||||||||||
| (4 marks) |
Notes
B4: For a correct line between \(x = -2\) and \(x = 3\)
B3 For a correct straight line segment through at least 3 of (−2, −10) (−1, −7) (0, −4) (1, −1) (2, 2) (3, 5)
OR for all of (−2, −10) (−1, −7) (0, −4) (1, −1) (2, 2) (3, 5) plotted but not joined
B2 For at least 2 correct points plotted OR for a line drawn with a positive gradient through (0, −4) and clear intention to use of a gradient of 3 (eg. a line through (0, −4) and (0.5, −1))
B1 For at least 2 correct points stated (may be in a table) OR for a line drawn with a positive gradient through (0, −4) but not a line joining (0, −4) and (3, 0) OR a line with gradient 3