First-Degree Functions Lecture Practice

Vocabulary flashcards covering the definitions and characteristics of first-degree functions, including slope, constant terms, and graphical properties.

First-degree function rule

The standard algebraic form of a first-degree function, represented as $f(x) = ax + b$.

Richtingscoëfficiënt (Slope)

Represented by the coefficient $a$; it determines the direction and steepness of the line.

Increasing function

A characteristic of a first-degree function where the slope a > 0.

Decreasing function

A characteristic of a first-degree function where the slope a < 0.

Steepness of the graph

Determined by the magnitude of the slope; the larger the absolute value $|a|$, the steeper the line.

Constant term

The value $b$ in the function rule, representing the y-coordinate of the intersection with the y-axis.

Parallel lines

Lines that possess the same richtingscoëfficiënt (slope).

Nulwaarde (Zero value/Root)

An x-value for which the function value (y-value) is exactly zero.

Tekentabel (Sign table)

A diagram that shows for which x-values the y-values are strictly negative, zero, or strictly positive.

Intersection with the y-axis

The point where the graph crosses the vertical axis, found where $x = 0$.

Intersection with the x-axis

The point where the graph crosses the horizontal axis, found at the x-value where $y = 0$, also known as the nulwaarde.

Domein (Domain)

The set of all possible x-values for which the function is defined.

Bereik (Range)

The set of all possible y-values that result from the function.