Practice

UNIT 3:

Input: ​The input and output replace variables in an
equation. The input is the known variable. EX: ​The Picture

Output:​ ​The input and output replace variables in an
equation. The input is the known variable. EX: ​The Picture

Linear Equation: ​An equation between two variables
that gives a straight line when plotted on a graph.

EX: ​2x-5=20
Linear Function: ​A linear function is any function
that graphs to a straight line. What this means
mathematically is that the function has either one
or two variables with no exponents or powers. EX:

(3,6), (4,8), (6,10) make a linear function.

Properties of Equalities: ​ The properties that
determine equalities of actions such as addition and

division. EX: ​The Picture

L​ike Terms: ​Terms whose variables and/or
exponents are the same. EX: ​4x and 5x are like terms.

Isolate: ​To isolate the variable is to rid itself of the
coefficients. EX: ​‘x’ is isolated.

Identity: ​An equality relation A=B and A and B
contain some variables. EX: ​5/2 and 2/2.

Absolute Value: ​The magnitude of a real number
without regard to its sign. EX: ​The absolute value of -9 is l 9 l.

Inverse Operations: ​Opposite operations that undo

each other. EX: ​4+5=9 and 9-5=4
Inequality:​ An inequality is like an equation that
uses symbols for less than and greater than instead

of equal to. EX: ​5c is less than 15.
Solution Set: T​ he set of all the solutions of an
equation or condition. EX: ​The Picture

Represent: ​Representation is a very general
relationship that expresses similarities between

objects. EX: The representation is ½ .

Compound Inequality: A​ sentence with two inequality
statements joined either by the word ‘or’ or by the
word ‘and’ indicates that both statements of the
compound are true at the same time. EX: ​x>4 and 5>x.