Changes

===Notes for teachers===

===Notes for teachers===

''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''

==''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''==

Slope is a number which represents the steepness of a line  

Slope is a number which represents the steepness of a line  

Students can relate the slope of line to the tangent of the angle of elevation.

Students can relate the slope of line to the tangent of the angle of elevation.