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Help me with this quadratic graph question?? Watch

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    Use the graph (y=2x^2) to estimate the value of √ 5
    Show clearly how you obtained your answer.

    How would you do this??
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    No idea and want to know the answer too :^(
    Hate being a brainlet tbh.
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    (Original post by Qwalk)
    No idea and want to know the answer too :^(
    Hate being a brainlet tbh.
    I have maths gcse this friday lol I'm not ready at all.
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    (Original post by Sizzo1128)
    I have maths gcse this friday lol I'm not ready at all.
    Aren't you doing A-Level maths?
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    What does the graph you already have look like? That may trigger some knowledge otherwise it's just words to me tbh
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    (Original post by Sizzo1128)
    Use the graph (y=2x^2) to estimate the value of √ 5
    Show clearly how you obtained your answer.

    How would you do this??
    If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

    Hope this helps.

    EDIT - Recommended website: https://www.desmos.com/calculator
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    (Original post by Sizzo1128)
    Use the graph (y=2x^2) to estimate the value of √ 5
    Show clearly how you obtained your answer.

    How would you do this??
    Can you please post a picture of the graph that you are given in this question? The method to use could depend on the axes scales.

    EDIT: Actually I'm guessing the y-axis must go up to 10.
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    (Original post by Sizzo1128)
    Use the graph (y=2x^2) to estimate the value of √ 5
    Show clearly how you obtained your answer.

    How would you do this??
    Just look where y=10 and read off the approximate x coordinate.
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    (Original post by Ashtan)
    What does the graph you already have look like? That may trigger some knowledge otherwise it's just words to me tbh
    Name:  Screen Shot 2017-11-08 at 21.00.59.png
Views: 7
Size:  91.0 KB
    Hi! I've uploaded the picture. Can you load it?)
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    (Original post by JemmaSimmons)
    If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

    Hope this helps.
    Yes what he said
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    (Original post by JemmaSimmons)
    If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

    Hope this helps.
    AHHH I finally get it!!! THANK YOUUUU
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    (Original post by MadMaths)
    Yes what he said
    At the time of writing, he hadn't said anything.
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    (Original post by Sizzo1128)
    AHHH I finally get it!!! THANK YOUUUU
    You're welcome, any time.
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    (Original post by rdkgames)
    just look where y=10 and read off the approximate x coordinate.
    thank you!
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    (Original post by JemmaSimmons)
    At the time of writing, he hadn't said anything.
    Yes because you got there before me, but what you said is correct

    Highest level of qualification:
    BSc Mathematics
    MSc Aerospace Engineering
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    (Original post by MadMaths)
    Yes because you got there before me, but what you said is correct

    Highest level of qualification:
    BSc Mathematics
    MSc Aerospace Engineering

    Well in that case, no comment was required.
    Good to know, but, ironically, this isn't rocket science.

    Never mind. Have a nice day.
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    (Original post by JemmaSimmons)
    Well in that case, no comment was required.
    Good to know, but, ironically, this isn't rocket science.

    Never mind. Have a nice day.
    Have a nice day darling
 
 
 
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