Easy -1.8 This is a 1-mark multiple choice question testing basic recall of perpendicular line properties. Students only need to know that perpendicular lines have gradients m₁ and m₂ where m₁m₂ = -1, or equivalently that coefficients swap and one changes sign (2x + 3y becomes 3x - 2y). No calculation or problem-solving required—pure pattern recognition.
The line \(L\) has equation \(2x + 3y = 7\)
Which one of the following is perpendicular to \(L\)?
Tick one box.
[1 mark]
\(2x - 3y = 7\)
\(3x + 2y = -7\)
\(2x + 3y = -\frac{1}{7}\)
\(3x - 2y = 7\)
The line $L$ has equation $2x + 3y = 7$
Which one of the following is perpendicular to $L$?
Tick one box.
[1 mark]
$2x - 3y = 7$
$3x + 2y = -7$
$2x + 3y = -\frac{1}{7}$
$3x - 2y = 7$
\hfill \mbox{\textit{AQA Paper 3 2018 Q3 [1]}}