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# algebra vocab

### 8th grade algebra vocab

Term | Definition |
---|---|

radical symbol | the symbol used to represent the non- negative square root of a number |

slope | a measure of the steepness of a line on a graph |

coefficent | the number that is multiplied by the variable in an algebraic expression |

cubed root | one of these equal factors(multiplication of a number. It is the side of a cube |

function | an input-output relationship that has exactly one output(y-value) for each input(x-value) |

intercepts | point where a line crosses the x-axis and y-axis |

irrational number | a number that can not be expressed as a ratio of two integers or as a repeating or terminating decimal |

line of best fit | a straight line that comes closest to the points on a scatter plot having an equal number of points above and below the line |

linear equation | an equation that makes a straight line when it's graphed |

non-linear function | a function (equation) whose graph is not a straight line |

radical symbol | the symbol used to represent the non-negative square root of a number |

rational number | a number that can be expressed as a ratio (fraction) of two integers |

scatter plot | a graph with points plotted to show a possible relationship between two sets of data |

scientific notation | a method of writing very large or very small numbers using powers of 10 |

slope intercept form | a linear equation written in the form y=mx+b (m represents slope and b represent the y-intercept |

square root | one of two equal factors (multiplication of a number. It is the side of a square |

domain | the of x-values that give rise to real y-values |

equations | mathematical sentences built from expressions using one or more equal signs |

evaluate | to find the value of an expression |

exponent | indicates how many times the base is to be used as a factor |

formula | an expression used to calculate a desired result |

line segment | 2 points on a line (endpoints) and all the points between them on the line |

order of operations | pemdas |

range | the set of y-vaules of a function or relation |

variable | a symbol for an unknown number usually expressed as a letter |

y-intercept | a point at which a graph intersects the y-axis |