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sm101

  • 2 years ago

Graph the inequality y > −4x

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  1. freewilly922
    • 2 years ago
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    Do you know how to graph y=-4x?

  2. sm101
    • 2 years ago
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    No, thats why I asked...

  3. freewilly922
    • 2 years ago
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    Not y>-4x but y=-4x

  4. sm101
    • 2 years ago
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    eh.. I don't know how to do either. Do you mind drawing it for me?

  5. freewilly922
    • 2 years ago
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    1) I can't do it for you. There are limits to the help we can give. The best I can do is show you. The easiest way is plug and chug. If you can find two points for an equation you can draw it by connecting the two points with a ruler and drawing a line. For y=-4x what is y for x=0 and x=-1? what is y=-4(0) ? y=-4(-1)?

  6. sm101
    • 2 years ago
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    y=0 and y=4

  7. sm101
    • 2 years ago
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    are these the 2 points?

  8. freewilly922
    • 2 years ago
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    These are the y values for your two points. (x1,y1) (x2,y2) You chose x1= 0 and x2=-1 and found y1= 0 and y2 = +4 so your points are (0,0) and (-1,4) so on graph paper or your own sketched graph you can plot (0,0) and (-1,4) draw a line between them.

  9. sm101
    • 2 years ago
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    ok.. would I have to shade anything on the graph.. or make the line that passes through the points dashed?

  10. freewilly922
    • 2 years ago
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    Yes. When it says y> -4x it is implying that all the y values above y=-4x. So that would mean you would dash the line, to show you are not including the line in the graph, and then shade everything ABOVE the dashed line.

  11. sm101
    • 2 years ago
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    I thought so... glad I checked.

  12. freewilly922
    • 2 years ago
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    So for (0,0) at x=0 all the y values above 0 should be shaded, but not 0.

  13. sm101
    • 2 years ago
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    Gotcha. Thank you!

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