Having the same or constant ratio.

• A. Constant
• B. Proportional
• C. Uniform
• D. Equivalent

Answer: (B)

The concept being tested is the idea of a proportional relationship, where two quantities change together in such a way that their ratio stays the same. If one quantity is proportional to the other, you can write it as y = kx, with k being a constant, so the ratio y/x equals k for any value of x. This constant ratio is what defines proportionality, making it the best description for “having the same or constant ratio.” Other terms don’t capture that two quantities maintain a fixed relationship: a constant refers to a fixed value of a single quantity, uniform means the same throughout, and equivalent means equal in value, which isn’t necessarily about a constant ratio between two variables.