Foundation June 2018 Paper 1 Q25
25 On the grid below, draw the graph of \(y = 1 - 4x\) for values of \(x\) from \(-3\) to 3 (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| Line drawn | B3 | for a correct line between \(x = -3\) and \(x = 3\) |
| (B2 | for a correct straight-line segment through at least 3 of \((-3, 13)\), \((-2, 9)\), \((-1, 5)\), \((0, 1)\), \((1, -3)\), \((2, -7)\), \((3, -11)\) or for all of these points plotted but not joined or for a line drawn with a negative gradient through \((0, 1)\) and clear intention to use a gradient of \(-4\), eg line through \((0, 1)\) and \((0.5, -1)\) | |
| (B1 | for at least 2 correct points stated or plotted or for a line drawn with a negative gradient through \((0, 1)\) or a line with gradient \(-4\)) |
Additional guidance
Ignore any incorrect points
Table of values
| \(x\) | \(-3\) | \(-2\) | \(-1\) | \(0\) | \(1\) | \(2\) | \(3\) |
|---|---|---|---|---|---|---|---|
| \(y\) | \(13\) | \(9\) | \(5\) | \(1\) | \(-3\) | \(-7\) | \(-11\) |
Ignore any incorrect points
coordinates may be in a table or in working