What is the constant of proportionality of y= 2/3x ? Algebra 1 Answer Parabola Apr 17, 2018 #2/3# Explanation: This is a function in the form of #y=mx+b# When #b=0#, the constant of proportionality is #m#. When #b!=0#, there is no constant of proportionality. Answer link Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? How do you calculate the ideal gas law constant? How do you find density in the ideal gas law? Does ideal gas law apply to liquids? Impact of this question 12845 views around the world You can reuse this answer Creative Commons License