Higher November 2018 Paper 2 Q7
7.
(a) A straight line passes through the points (0, 7) and (3, 19).
Find the equation of the straight line.
Give your answer in the form \(y = mx + c\). [3]
Find the equation of the straight line.
Give your answer in the form \(y = mx + c\). [3]
(b) Which two of the following equations represent a straight line that is parallel to \(y = 8x - 3\)?
Circle your answers. [2]
Circle your answers. [2]
\(y = -3x + 3\) \(y = 8x + 3\) \(y = -8x + 3\)
\(y = -8x - 8\) \(8x + y + 3 = 0\) \(y - 8x - 8 = 0\)
| Scheme | Marks | Comments |
|---|---|---|
| \(y = 4x + 7\) | B3 | Must be given as an equation B2 for sight of \(y = 4x\ (+\ldots)\) or \(m = 4\), OR B1 for sight of \(y = (\ldots x) + 7\) or \(c = 7\) |
| Scheme | Marks | Comments |
|---|---|---|
| \(y = 8x + 3\) and \(y - 8x - 8 = 0\), with no other equations indicated | B2 | B1 for both correct answers with another equation also indicated, or B1 for one correct selection with at most one incorrect selection |
| (5) |