proportionality
in mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a constant
en-US/pɹəˌpɔɹʃəˈnælɪti/
en-GB/pɹəpɔːʃənælɪtiː/
in mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a constant