Grade 7 Math #4.2a, Proportions and Rate of change

An explanation of proportions, rate of change, constant of proportionality, k=y/x, y=kx. If you like my videos, think they are helpful, and would like to help me in return, please go to Patreon.com and become a monthly Patron and subscriber to Joann's School. Thank You!   / joannsschool