Higher June 2018 Paper 2 Q3
3 The line L is shown on the grid.
Find an equation for L. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(y = 3x - 6\) | M1 | for a correct method to find the gradient of the line, or \(m = 3\) OR identifies \(-6\) as the intercept in words or in a partial equation OR \(y - b = m(x - a)\) where \(m \neq 3\) and \((a, b)\) is a correct coordinate |
| M1 | for \(y = 3x + c\) or (L=) \(3x - 6\) or \(y = \text{``}3\text{''}x - 6\) OR \(y - y_1 = 3(x - x_1)\) or \(y - b = \text{``}3\text{''}(x - a)\) where \((a, b)\) is a correct coordinate | |
| A1 | accept \(y = 3x + -6\) oe |
Additional guidance
Just ringing -6 is insufficient
Award of this mark implies the first M1
\(c\) must be seen either as a letter or a number