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# STAAR Key words

### Must know basic vocabulary for STAAR

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

Asymptote | Boundary the graph does not cross. Y=0 is the equation. |

Causation | one event causes another, example: exposure to sun causes sunburn |

Y-Intercept | Where the graph crosses or touches the y axis. |

Correlation Coefficient | a decimal between -1 to 1 that shows how closely related two events are, closer to 1 (or -1) is strong. Closer to zero is weak. |

Slope | the rate of change of a linear function, the rise over run, “m” |

Y as a Function of X | a function has no repeating x-values and passes the vertical line test |

Zero | the point or points where a graph crosses the x-axis, AKA: roots, x-intercepts, solutions |

Vertex | the point where a parabola changes directions, the minimum or maximum point |

Axis of Symmetry | the x = equation that divides the parabola into identical halves |

Domain | all the x-values of a function, left to right |

Range | all the y-values of a function, f(x) values, bottom to top |

Rate of Change | the amount of vertical change for each unit of horizontal change, same as slope |

Solution to a System | the point (x,y) of intersection of two lines, infinite and no solution are also options |

Solution to a Quadratic | the zeroes or x-intercepts of a quadratic, it can be 1, 2 or no answer. |

Solution to an Inequality | the shaded region of an inequality, or on the solid line. Dotted line not included. |

Steeper | moves up faster than it does over.; harder to ride your bike up |

X-Intercept | the point (?, 0) where a graph crosses the x-axis (right/left axis), AKA: roots, zeros, solutions |

Dependent Quantity | the variable that depends on the other one, y is dependent on x |

Independent Quantity | the variable that is depended upon, x is independent |

Minimum | the lowest y-value of a graph |

Maximum | the highest y-value of a graph |

Parent Function – Linear | y = x, straight line with a slope of 1 that goes through the origin |

Parent Function – Quadratic | y = x2 parabola that is sitting on the origin opening up |

< | less than, shade below dotted line. |

<= | less than, shade below solid line |

Direct Variation (varies directly) | A proportional relationship. Graph always goes through (0,0) |

Perpendicular | Forms a right angle (90 degrees). The slopes are reciprocal (opposite sign and flipped upside down). |

Vertical Stretch | Gets narrower. Stretches from top and bottom. The “a” value gets farther away from zero. |

Vertical Shrink or compression | Gets wider. Shrinks from top and bottom. The “a” value gets closer to zero (closer to a flat line). |

Created by:
dshannon2