VocabularyChapter 5

The phrase meaning the relationship between two changing quantities is the

Rate of change.

The ratio for the vertical change(or rise) to the horizontal change or (run) is called the

Slope.

A relationship that can be represented by a function in the form y = kx is called a

Direct variation.

An equation that models a linear function is called a

Linear equation.

The slope-intercept form of a linear equation is given by

y = mx + b

The point-slope form of a linear equation is given by

y – y₁ = m(x - x₁)

The standard form of a linear equation is given by

Ax + By = C

The x- and y-coordinates where a graph crosses the x- and y-axis are called the

x- and y-intercepts

Lines in the same plane that do not intersect are called

Parallel lines

Lines that intersect to form right angles are called

Perpendicular lines

Two numbers whose product is -1 are called

Opposite reciprocals

The slopes of parallel lines are

Equal

The slopes of perpendicular lines are

Opposite reciprocals

A graph that relates two different sets of data by displaying them as ordered pairs is called a

Scatter plot

A line on a scatter plot, drawn near the points, that shows a correlation is called a

Trend line

Using a trend line to estimate a value between known values is called

Interpolation

Using a trend line to estimate values outside the range of known values is called

extrapolation

The trend line that shows the relationship between two sets of data the most accurately is called the

Line of best fit

Functions that have V-shaped graphs that open up or down are called

Absolute value functions

A shift of a graph horizontally, vertically, or both is also called a

Translation