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# Review- Unit

### Thinking with Mathematical Models

Question | Answer |
---|---|

Find the y-intercept(starting point) in this equation. y=3x-1 | -1 |

If the x-axis goes by +2 and the y-axis goes by +6, (using delta y over delta x) what is the slope(rate of change)? | 3 |

Find the y-intercept(starting point) in this equation. y=-2x+13 | 13 |

If the x-axis goes by +1 and the y-axis goes by -2, (using delta y over delta x) what is the slope(rate of change)? | -2 |

Find the y-intercept(starting point) in this equation. y=0.5x+1 | 1 |

If the x-axis goes by +2 and the y-axis goes by +1, (using delta y over delta x) what is the slope(rate of change)? | 0.5 |

Determine if the following equation is increasing, decreasing, stays the same, or is undefined. y=0.5x+1 | Increasing |

Find the y-intercept(starting point) in this equation. y=-3x+4 | 4 |

If the x-axis goes by +1 and the y-axis goes by -3, (using delta y over delta x) what is the slope(rate of change)? | -3 |

Determine if the following equation is increasing, decreasing, stays the same, or is undefined. y=-3x+4 | Decreasing |

Find the y-intercept(starting point) in this equation. y=1+2x | 1 |

If the x-axis goes by +1 and the y-axis goes by +2, (using delta y over delta x) what is the slope(rate of change)? | 2 |

Find the y-intercept(starting point) in this equation. Look carefully! y=(-1/3)x+6 | 6 |

If the x-axis goes by +1 and the y-axis goes by (-1/3), (using delta y over delta x) what is the slope(rate of change)? | -1/3 |

Write an equation with the given information. Slope(rate of change)=2 and Y-Intercept(starting point)=-5 | y=2x-5 |

Write an equation with the given information. Points on graph= (4,2) and (6,8) | y=3x-10 |

Write an equation with the given information. Look carefully! Slope(rate of change)=0 and Y-intercept(starting point)=3 | y=3 |

Which is linear? y=(2/3)x-4 or y=(20/x) | y=(2/3)x-4 |

True or False? This equation is non-linear! y=-3x+12 | False |

True or False? This equation is linear! y=-2x+4 | True |

If a line goes from top left to bottom right it's... | Negative |

If a line goes from bottom left to top right it's... | Positive |

If a line goes straight across the y-axis it's... | Staying the same |

If a line goes straight down and never touches the y-axis it's... | Undefined |

Find the y-intercept(starting point) in this equation. y=(-1/2)x+40 | 40 |

If the x-axis goes by +1 and the y-axis goes by -2, (using delta y over delta x) what is the slope(rate of change)? | -1/2 |

Use the equation to answer this question. y=-2,000x+30,000 If x=5 what would the answer be? | 20,000 |

Use the equation to answer this question. y=-2,000x+30,000 What number would you have to multiply to this to equal 0? | 15 |

Use the equation to answer this question. y=5x+100 If x=42 what would the answer be? | 310 |

Use the equation to answer this question. y=5x+100 What number would you have to multiply to this to equal 160? | 12 |

Use the equation to answer this question. y=-23x+1,874 If x=5 what would the answer be? | 1759 |

Use the equation to answer this question. y=-23x+1,874 What number would you have to multiply to this to equal 1,506? | 11 |

Find the y-intercept(starting point) in this equation. y=(4.95/5)x+0.96 | 0.96 |

If the x-axis goes by +5 and the y-axis goes by +4.95, (using delta y over delta x) what is the slope(rate of change)? | 4.95/5 |

Use the equation to answer this question. y=(4.95/5)x+0.96 If x=25 what would the answer be? | 25.71 |

Use the equation to answer this question. y=(4.95/5)x+0.96 What number would you have to multiply to this to equal (about)12? | 11 |

If you're having any trouble with this, besides study more, what can you do? | Look at your review packet! DUH!!! |

Created by:
Krispy Creme