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Unit 1: Quantities and Modeling and Unit 2: Understanding Functions
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Algebra
Academic Workshop
9th
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32 Terms
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1
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constant
A value that does not change
2
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Variable
A symbol used to represent a quantity that can change
3
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Coefficient
A number is multiplied by a variable in an algebraic expression.
4
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algebreic expression
A combination of variables, numbers, and at least one operation.
5
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ratio
A comparison of two quantities by division
6
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proportion
an equation that states that two ratios are equal
7
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scale
the ratio of any length in a scale drawing or scale model to the corresponding actual length
8
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scale drawing
a drawing that is the same shape as the object it represents
9
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scale model
a model used to represent an object that is too large or too small to be built at the actual size
10
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rate
A ratio that compares two quantities measured in different units
11
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conversion factor
a ratio of equivalent measurements
12
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numerical expression
An expression that contains only numbers and operations
13
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equivalent expressions
Expressions with the same value
14
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Literal Equations
equations that contain two or more variables and sometimes no numbers at all
15
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compound statement
two or more statements joined by the word "and" or "or"
16
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intersection
the point at which two lines or roads meet and cut across each other
17
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union
combined region, of the simple inequality graphs
18
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less than
Less than is used to compare two numbers when the first number is smaller than the second number.
19
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less than or equal to
≤
20
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more than
>
21
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more than or equal to
greater than or equal to
22
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Domain
input, x value, independent variable
23
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Range
output, y value, dependent variable
24
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function notation
A list or sentence containing the values that represent the domain or range of a function
25
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relation
any set of ordered pairs
26
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function
a relation in which each element of the domain is paired with exactly one element of the range
27
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verticle line test
draw a vertical line anywhere(everywhere) if it crosses the graph in one place, the graph is a function
28
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function machine
An imaginary machine used in MATHEMATICS to change numbers according to a given rule.
29
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independent variable
a variable (often denoted by x ) whose variation does not depend on that of another.
30
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dependent variable
a variable (often denoted by y ) whose value depends on that of another.
31
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function rule
an equation that describes a function
32
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function (graph)
Every x goes to only one y. A graph passes the vertical line test.
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