Cheatography

# Algebra 1 - Unit 1 Representing Relationships Cheat Sheet by anjuscha

This is for the first unit in Algebra 1

### Defining terms

 ray part of a line that has one endpoint and extends indefi­nitely in one direction line segment a part of a line that has two endpoints and a specific length perpen­dicular lines lines that intersect to form right, or 90-degree, angles parallel lines lines that lie in the same plane and do not intersect

### Quanti­tative Reasoning

 compare to explain or show the simila­rities or differ­ences between items or ideas scenario an imagined or projected sequence of events constant a number or a variable whose value does not change quantity measurable attribute of a thing or event rate a ratio comparing quantities measured in different units

### Introd­uction to Functions

 range the set of output values corres­ponding to the domain values dependent variable the variable in a function that represents the output values; the second coordinate in the ordered pairs function a relation in which each element of the domain is mapped to (paired with) exactly one element of the range domain the set of input values for which the function is defined relation a set of ordered pairs indepe­ndent variable the variable in a function that represents the input values; the first coordinate in the ordered pairs

### Writing and Graphing Equations in Two Variables

 assume to accept as true without proof viable capable of working succes­sfully; practical, realistic, usable, possible continuous graph a graph in the coordinate plane made up of connected ines or curves with no breaks coordinate plane a graph that has a finite number of data points ordered pair the pair of numbers, given in a specific order used to locate a point a coordinate plane

### Creating an Input/­Output Table of Values

Domain is x-axis, while Range is y-xis

### Defini­tions

 discrete graph a graph that has a finite or limited number of data points function notation a notation that tradit­ionally replaces the dependent variable in a function with 𝑓𝑓(𝑥𝑥), where 𝑓𝑓repr­esents the valueof the dependent variable at a given indepe­ndent value, 𝑥𝑥 continuous graph a graph in the coordinate plane made up of connected lines or curves with no breaks