Ch. 2 & 3 Vocab Exam

Front

Constant of Proportionality

Back

the constant ratio in a proportional linear relationship

Front

Constant of variation

Back

a constant ratio in a direct variation

Front

Constant rate of change

Back

Rate of change between any two points in a linear relationship is constant.

Front

Direct variation

Back

A relationship between two variable quantities with a constant ratio.

Front

Linear relationship

Back

A relationship that has a straight-line graph.

Front

Point-slope form

Back

y - y₁ = m(x - x₁), m is the slope, (x₁, y₁) is a point on a nonvertical line.

Front

Rise

Back

Vertical change between two points on a line.

Front

Run: the horizontal change between any two points on a line

Back

the horizontal change between any two points on a line

Front

Slope: rate of change between two points on a line; ratio of rise (vertical change) to run (horizontal change).

Back

rise over run

Front

Slope-intercept form

Back

y = mx + b (m = slope, b = y-intercept)