1MA0 Foundation November 2014 Paper 2 Q25
25 On the grid, draw the graph of \(y = 2x - 3\) for values of \(x\) from \(-2\) to 3 (4)
| Answer | Mark | Notes |
|---|---|---|
| Straight line from \((-2, -7)\) to \((3, 3)\) | 4 | (Table of values) C1 for axes scaled and labelled M1 for at least 2 correct attempts to find points by substituting values of \(x\) M1 ft for plotting at least 2 of their points (any points plotted from their table must be plotted correctly) A1 for correct line between \(x = -2\) and \(x = 3\) (No table of values) C1 for axes scaled and labelled M1 for at least 2 correct points with no more than 2 incorrect points M1 for at least 2 correct points (and no incorrect points) plotted OR line segment of \(y = 2x - 3\) drawn A1 for correct line between \(x = -2\) and \(x = 3\) (Use of \(y = mx + c\)) C1 for axes scaled and labelled M1 for line drawn with gradient of 2 OR line drawn with a \(y\) intercept of \(-3\) M1 for line drawn with gradient of 2 AND with a \(y\) intercept of \(-3\) A1 for correct line between \(x = -2\) and \(x = 3\) [SC B2 (indep of C1) for the correct line between \(x = 0\) and \(x = 3\), ignore any additional incorrect line segment(s)] |
Working
| \(x\) | \(-2\) | \(-1\) | 0 | 1 | 2 | 3 |
|---|---|---|---|---|---|---|
| \(y\) | \(-7\) | \(-5\) | \(-3\) | \(-1\) | 1 | 3 |