constant of porportionality
porportions
definition
the constant of proportionality of two proportional ratios is the value of the each of the ratios which will be the same
https://www.tes.com/lessons/LnoyouSXbrkMcg/constant-of-proportionality
Finding Constant of Proportionality
Step 1: Find the constant of proportionality equation y=kx by given data.
Step 2: Substitute the constant or variables values.
Step 3: Solve the unknowns values.
Step 4: Simplify for the required result.
http://math.tutorcircle.com/number-sense/constant-of-proportionality.html