Higher June 2019 Paper 2 Q2
2 On the grid below, draw the graph of \(y = 2x - 3\) for values of \(x\) from \(-2\) to 4 (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| Graph | B3 | for a correct line between \(x = -2\) and \(x = 4\) |
| (B2 | for a correct straight line segment through at least 3 of \((-2, -7)\), \((-1, -5)\), \((0, -3)\), \((1, -1)\), \((2, 1)\), \((3, 3)\), \((4, 5)\) or for all of these points plotted but not joined OR for a line drawn with a positive gradient through \((0, -3)\) and clear intention to use a gradient of 2, eg line through \((0, -3)\) going across 2 squares and up 4 squares) | |
| (B1 | for at least 2 correct points stated or plotted OR for a line drawn with a positive gradient through \((0, -3)\) OR a line with gradient 2) |
Additional guidance
Ignore any incorrect points. Points need not be plotted for a correct line (segment) drawn
Table of values
| \(x\) | −2 | −1 | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|---|---|
| \(y\) | −7 | −5 | −3 | −1 | 1 | 3 | 5 |
Ignore any incorrect points
Coordinates may be in a table or in working