Threethings determine if a relationship is proportional
in Other Math Topics by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

If x is one variable in the relationship and y is the other, then xy=constant for all values of x and y (that's inverse proportionality); or y=ax (where a is a constant) for direct proportionality, so that y=0 when x=0. So we could say:

  1. One variable changes as the other changes: one increases as the other increases in a linear fashion (a graph would be a straight line) – direct proportionality;
  2. If directly proportional, the graph is a straight line passing through the origin;
  3. One variable changes as the other changes: one increases as the other decreases (non-linear) – inverse proportionality, and their product is constant.
by Top Rated User (1.2m points)

Related questions

2 answers
1 answer
asked Mar 18, 2015 in Word Problem Answers by anonymous | 614 views
1 answer
asked Sep 29, 2014 in Other Math Topics by anonymous | 642 views
1 answer
asked Sep 20, 2013 in Algebra 1 Answers by kareem | 556 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
87,516 questions
100,344 answers
2,420 comments
763,832 users