Representing-Inequalities-On-A-Number-Line Edexcel Foundation

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Exam code:1MA1

Representing inequalities on a number line

Draw circles above the end points and connect them with a horizontal line
- Leave an open circle for end points with strict inequalities, < or >
  - These end points are not included
- Fill in a solid circle for end points with ≤ or ≥ inequalities
  - These end points are included
Use a horizontal arrow for inequalities with one end point
- x > 5 is an open circle at 5 with a horizontal arrow pointing to the right

Represent the following inequalities on a number line.

(a) $negative 2 less or equal than x less than 1$

-2 is included so use a closed circle

1 is not included so use an open circle

(b) $t less than 3$

3 is not included so use an open circle

There is no second end point
Any value less than three is accepted, so draw a horizontal arrow to the left