Inequalities on Number Line - Add controls to Raise above x axis (II)

Lew W. S.
This approach uses Unicode to check the <, >, <=, >= (4 inequalities symbol) and selects the correct type of point style to implement , and also the direction of the inequalities. Also the CAS was used to solve combined inequalities a && b. 2 May 2020 The technique here was incorporated into the Solve simultaneous linear inequalities exercise at