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Unit 3 Vocabulary- Functions

Math 8 2019-2020

Across
shows how the elements are paired. It’s like a flow chart for a function, showing the input and output values.
A notation for representing an interval as a pair of numbers. The numbers are the endpoints of the interval. Parentheses and/or brackets are used to show whether the endpoints are excluded or included. For example, [3, 8) is the interval of real numbers between 3 and 8, including 3 and excluding 8.
a visual way to determine if a curve is a graph of a function or not.
a collection of ordered pairs containing one object from each set
the four quarters of the coordinate plane. Starting in the upper right-hand side and moving counter-clockwise, they are 1, 2, 3, and 4.
The set of (x, y) values that determine the placement of a point on the coordinate plane.
the complete set of possible values of the independent or x variable.
Down
a function that is defined by an interval of acceptable values across its domain. Includes fraction and decimal values because it represents data that can be broken down into smaller increments.
Read “f of x”. It means the same thing as “y” and represents the range. It is meant to be a precise way of giving information about the function without a rather lengthy written explanation.
A function that is defined only for a set of numbers that can be listed, such as the set of whole numbers or the set of integers.
a relation between sets that associates to every element of a first set exactly one element of the second set
a two-dimensional number line where the vertical line is called the y-axis and the horizontal is called the x-axis.
a starting point on a grid. It is the point (0,0), where the x-axis and y-axis intercept.
the complete set of all possible resulting values of the dependent variable (y), after we have substituted the domain.