1MA0 Higher November 2013 Paper 1 Q12
12 On the grid, draw the graph of \(y = 3x + 2\) for values of \(x\) from \(-2\) to 2 (4)
| Answer | Mark | Notes |
|---|---|---|
| \(y = 3x + 2\) drawn | 4 | B1 for axes scaled and labelled (Table of values) 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 from their table must be correctly plotted) A1 for correct line between \(x = -2\) and \(x = 2\) (No table of values) 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 \(y = 3x + 2\) drawn A1 for correct line between \(x = -2\) and \(x = 2\) (Use of \(y = mx + c\)) M1 for line drawn with gradient of 3 OR line drawn with \(y\) intercept at 2 M1 for line drawn with gradient of 3 AND with \(y\) intercept at 2 A1 for correct line between \(x = -2\) and \(x = 2\) SC B2 (indep of B1) for correct line segment between \(x = 0\) and \(x = 2\) (ignore any additional incorrect line segment(s)) |
Working
| \(x\) | \(-2\) | \(-1\) | 0 | 1 | 2 |
|---|---|---|---|---|---|
| \(y\) | \(-4\) | \(-1\) | 2 | 5 | 8 |