Khan Academy (English - US curriculum)
Math by grade
Illustrative Mathematics
7th grade (Illustrative Mathematics)
Unit 2: Introducing proportional relationships
Lesson 11: Interpreting graphs of proportional relationships
Lesson 11: Interpreting graphs of proportional relationships
Constant of proportionality from graph
Constant of proportionality from graphs
Interpreting graphs of proportional relationships
Interpreting graphs of proportional relationships