Question: how to tell if a relationship is proportional?
Answer: 3 Ways to Determine if Proportional Relationships Exist: To determine if a simple given proportion is true, look at the fractions. If these ratios (fractions) both reduce to the same value, the proportion is true. Double check: the "cross multiply" of 12 • 9 = 4 • 27 is true. both fractions reduce to 1/3.