1. Functions and mappings
A3.2 Core Plenary
Aijaz drew this mapping diagram on squared paper.
He chose a point A and drew straight lines from it to cut the x- and y-lines.
He found that the mapping was x → 2x.
Investigate the mapping when straight lines are drawn from B and from C. Can you find a pattern? A B C 1 2 3 4 5 6 x y
Preamble
This activity gives pupils the chance to use the skills they have gained in drawing and interpreting mapping diagrams in an investigative context.
Possible content
Using and interpreting mapping diagrams, pattern spotting.
Resources
Squared paper for drawing mapping diagrams.
Solution/Notes
A: x → 2x
B: x → 2x – 1
C: x → 2x − 2 B C 1 2 3 4 5 6 x y