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Math Help - questions on xy plane

  1. #1
    Junior Member
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    Sep 2007
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    Question questions on xy plane

    Line-related questions:


    1. The point (0,0) is called the _____.
    2. What is the slope of a vertical line? It's undefined, right?
    3. When graphing, the independent variable is... always on the x-axis right?
    4. In the equation y = -3x, the y-intercept is ___. It doesn't show a y-intercept??
    5. For the point (4,5) the 5 means five units along the ___ axis. y, right?
    6. What is the slope of a horizontal line? I think its 0/1
    7. If a line's slope increases, the graph wgill change by... getting steeper?
    8. What is the intercept of C = 12 - 1.2t 12?
    9. What is the slope of (4,5) and (-1,3)? -2/-5?
    10. What is the slope of M = 0.03 - 0.08n? 0.08??
    11. To plot a point, we plot on the ___ axis and then the __ axis ??
    12. The formula for slope is y=mx+b
    13. The y-intercept is the point on the graph here the line intersects with the y-axis??
    14. Points that lie on the same line are ____???
    15. What is the slope of a lne whose x-value is always 2? ???
    16. If a line crosses the origin, its y-intercept is ____???

    The answers I think could be right are in bold. Urgent!
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  2. #2
    Super Member

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    Lexington, MA (USA)
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    Hello, ~NeonFire372~!

    You did pretty good . . . my comments are in blue.


    1. The point (0,0) is called the _____. .origin

    2. What is the slope of a vertical line? It's undefined, right? .Right!

    3. When graphing, the independent variable is... always on the x-axis right?] .Right!

    4. In the equation y = -3x, the y-intercept is ___. .zero

    5. For the point (4,5) the 5 means five units along the ___ axis. y, right?] .Right!

    6. What is the slope of a horizontal line? I think its 0/1 .just 0

    7. If a line's slope increases, the graph will change by... getting steeper? .Right!

    8. What is the intercept of C = 12 - 1.2t [B]12? .Right!

    9. What is the slope of (4,5) and (-1,3)? -2/-5? .Just 2/5

    10. What is the slope of M = 0.03 - 0.08n? 0.08? .-0.08

    11. To plot a point, we plot on the ___ axis and then the __ axis ?? .x axis, then the y axis

    12. The formula for slope is y=mx+b .No ... {\color{blue}m \:=\:\frac{y_2-y_1}{x_2-x_1}}

    13. The y-intercept is the point on the graph where the line intersects with the y-axis?? .Right!

    14. Points that lie on the same line are ____ .collinear

    15. What is the slope of a lne whose x-value is always 2? .Undefined, it's a vertical line.

    16. If a line crosses the origin, its y-intercept is ____ .Zero ... see #4

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  3. #3
    Junior Member
    Joined
    Sep 2007
    Posts
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    Thanks!
    Last edited by ~NeonFire372~; January 20th 2008 at 05:12 AM.
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