Grade 7 Unit 2 Vocabulary Review

This set of flashcards covers the vocabulary terms and mathematical concepts from the Grade 7 Unit 2 glossary, including proportional relationships, coordinate geometry, and algebraic expressions.

coefficient

A number that is multiplied by a variable, usually without a symbol between them; for example, in the expression $5x + 8$, 5 is the coefficient of $x$.

constant of proportionality

In a proportional relationship, the number used to multiply the values for one quantity to get the values for the other quantity.

coordinate plane

A plane consisting of two axes that intersect at $0$: one horizontal (often called the x-axis) and one vertical (often called the y-axis).

equivalent ratio

Two ratios are equivalent if each value in the first ratio can be multiplied by the same number to get the values in the second ratio; for example, $3 : 2$ is equivalent to $6 : 4$.

origin

The point $(0, 0)$ on the coordinate plane where the x-axis and the y-axis intersect.

proportional relationship

A relationship where two variables can be multiplied by the same number to get the values for the other; the graph of this relationship is a straight line passing through the origin, $(0, 0)$.

reciprocal

Two numbers whose product is 1; for example, $\frac{3}{2}$ and $\frac{2}{3}$ are reciprocals because $\frac{3}{2} \times \frac{2}{3} = 1$.

scaled copy

A copy of an image that may change in size but always maintains the shape and angle measurements of the original, created by multiplying every length in the original figure by the same number.