Proportional Relationships Flashcards

Grade 7 · Math · Flashcards

Key vocabulary and concepts for proportional relationships in 7th grade math.

Flashcards

Proportional relationship: A relationship between two quantities where their ratio y/x is always the same
Constant of proportionality (k): The fixed value k in y = kx that represents the unit rate
y = kx: The equation form of a proportional relationship
Unit rate: A ratio with a denominator of 1, like 60 miles per 1 hour
Origin: The point (0, 0) — all proportional relationship graphs pass through here
How to find k from a table: Divide any y-value by its corresponding x-value: k = y ÷ x
Non-proportional linear relationship: A straight line that does NOT pass through the origin, like y = 2x + 5
Ratio: A comparison of two quantities by division, such as 3:6 or 1/2
Proportional relationship in a table: Every y/x ratio in the table is equal — the ratio never changes
Scaling in proportional relationships: Multiplying x by any number multiplies y by the same number