The amplitude of this graph is?

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

Equation for the calculation double 2 and then add 5

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?