V

value

The possible outcomes of a variable. For example, red, green, and blue are possible values for the variable color. Two meters and 1.65 meters are possible values for the variable length.

pages 3–7, 8–13, 14–19

variable

1. A quality or quantity that changes or varies in an investigation. (See also categorical variable and numerical variable.)

2. A symbol that can stand for a variable.

pages 3–7, 8–13, 35, 37–38, 164–166, 185–186, 475–478, 561–562

vertex

The common endpoint of two rays or line segments.

pages 381, 390–392, 397, 403, 406

vertical axis

In a coordinate grid, the y-axis. It is perpendicular to the horizontal axis.

pages 5–6, 10–11, 29, 36–37

volume

The measure of the amount of space occupied by an object.

pages 554–568

volume by displacement

A way of measuring volume by measuring the amount of water (or some other fluid) it displaces.

pages 555–557