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# Unit 1: Review Alg 2

### Vocabulary terms for sections 1-1, 1-2, 1-3, 1-4, 2-1, 2-2, and 2-4

TermDefinition
Opposite The additive inverse of any number a is -a.
Additive Inverse The opposite of any number a is -a.
Reciprocal The multiplicative inverse of any nonzero number a is 1/a.
Multiplicative Inverse The reciprocal of any nonzero number a is 1/a.
Absolute Value The distance from zero on the number line.
Variable A symbol, usually a letter, that represents one of more numbers.
Expression Combination of one or more variables.
Evaluate Substitute numbers for variables in an expression and follow the order of operations.
Term A number, variable, or the product of a number and one or more variables.
Coefficient The numerical factor in a term.
Solution of an equation A number that makes an equation true.
Compound Inequality A pair of inequalities joined by "and" or "or".
Relation A set of pairs of input and output values.
Domain The set of all inputs, or x-coordinates of ordered pairs.
Range The set of all outputs, or y-coordinates of ordered pairs.
Mapping Diagram Links the elements of the domain with corresponding elements of the range.
Function A relation in which each element of the domain is paired with exactly one element in the range.
Linear Function A function whose graph is a line.
Dependent Variable y variable
Independent Variable x variable
y-intercept Point at which the line crosses the y-axis.
x-intercept Point at which the line crosses the x-axis.
Standard form of a linear equation Ax + By = C
Slope The ratio of the vertical change to a corresponding horizontal change. Rise over run.
Point-slope form y – y1 = m(x – x1)
Slope-intercept form y = mx + b
Created by: SHSMath