Unit 3 Linear Relationships and Functions Vocabulary

Front

Constant of Proportionality

Back

The number you multiply by in a proportional relationship to get from one value to another (often called 𝑘 in 𝑦 = 𝑘𝑥).

Front

Domain

Back

All the possible input values (usually x-values) you can use in a function.

Front

Range

Back

All the possible output values (usually y-values) of a function.

Front

Horizontal Axis

Back

The line that goes left to right on a graph (the x-axis).

Front

Initial Value

Back

The starting amount or value, often where a graph crosses the y-axis.

Front

Key Characteristics of a Function

Back

The important features of a function, like its intercepts, maximums or minimums, intervals of increase or decrease, and rate of change.

Front

Linear Relationship

Back

A relationship that forms a straight line when graphed.

Front

Slope-Intercept Form

Back

A way to write the equation of a line as 𝑦 = 𝑚𝑥 + 𝑏, where 𝑚 is the slope and 𝑏 is the y-intercept.

Front

Non-Proportional Relationship

Back

A relationship where the ratio between the two quantities is not always the same.

Front

Point-Slope Form

Back

A way to write the equation of a line using a point and the slope: 𝑦 − 𝑦₁ = 𝑚(𝑥 − 𝑥₁).