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anonymous

  • one year ago

please help :) Is this linear? why or why not? x: 2 4 6 8 y: 1 5 15 30 thanks :)

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  1. geerky42
    • one year ago
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    Can you find slope from given two points? From table, we have points \((2,1)\) and \((4,5)\). Can you find slope? Now what about \((4,5)\) and \((6,15)\)?

  2. anonymous
    • one year ago
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    are you asking for the slope? if so, it's 2 and 5/2

  3. anonymous
    • one year ago
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    @geerky42

  4. anonymous
    • one year ago
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    There are a few ways to tell if it is linear or not. You could graph the points and see if it form a straight line like and if it does form a straight line it is linear. Here is the points on a graph. https://www.desmos.com/calculator/slvgj1hncp As you can see the points do not form a straight line and looks more like an equation of the form \( y = x^2 \), which is not linear(straight line) If you do not want to graph the points and want to just use the table you provided, You look at all the x and see if it has a constant rate of change and you look at the y values to see if they have a constant rate of change too. If they both have a constant rate of change, it is linear. If they do not, it is not linear. The value of x has a constant rate of change. It is changing by 2. If you look at the y values, it does not have a constant rate of change. The y values go from 5 15 and then all the way to 30, which means there is nothing constant about the y values so since the x values and the y values do not have a constant rate of change, it is not linear.

  5. anonymous
    • one year ago
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    @geerky42 you cannot tell if a set of points are linear or not by the slope of two points

  6. anonymous
    • one year ago
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  7. geerky42
    • one year ago
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    No, but with three points, if slopes between them are different, then we can tell that it is not linear. This is what I am trying to saying... @Nixy

  8. geerky42
    • one year ago
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    Since slopes are different, it is clear it's not linear.

  9. anonymous
    • one year ago
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    I get it now :) thanks!

  10. anonymous
    • one year ago
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    @geerky42 ah I see what you were going for now. With that said, It is a lot easier to look and see if x and y are constant and if they are you know it is linear. This leaves out having to get the slope. Essentially, that is what you are doing by getting the slope. You are checking to see if you have a constant rate of change or not. If the slopes are different, you do not have a constant rate of change On that note, use what works for ya. :-)

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