Edexcel D1 2007 June — Question 1

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2007
SessionJune
PaperDownload PDF ↗
Mark schemeDownload PDF ↗
TopicGraph Theory Fundamentals
TypePlanarity by redrawing
DifficultyEasy -1.8 This is a pure recall question worth only 2 marks, asking for a textbook definition with no application or problem-solving required. It tests only whether students remember the basic terminology of planar graphs, making it significantly easier than average A-level questions.
Spec7.02l Planar graphs: planarity, subdivision, contraction

Explain what is meant by a planar graph. (Total 2 marks)

AnswerMarks
A graph is planar if it can be drawn in a plane in such a way that no two edges meet each other, except at a vertex to which they are both incidentB2, 1, 0
A graph is planar if it can be drawn in a plane in such a way that no two edges meet each other, except at a vertex to which they are both incident | B2, 1, 0 |

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Explain what is meant by a planar graph.
(Total 2 marks)

\hfill \mbox{\textit{Edexcel D1 2007 Q1}}