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    How do you find the frequency in a histogram? I tried using the formula frequency density x class width = frequency but I heard something about a multiplier needed which is then multiplied by the area?

    Please help!
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    Frequency is just area of the whole histogram
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    (Original post by N/A IS THE NAME)
    Frequency is just area of the whole histogram
    I know this but the answer was wrong apparently? A multiplier is needed. I'm not sure how the multiplier is worked out.
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    (Original post by badmathkid)
    I know this but the answer was wrong apparently? A multiplier is needed. I'm not sure how the multiplier is worked out.
    Are you talking about find the value of the yaxis
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    (Original post by N/A IS THE NAME)
    Are you talking about find the value of the yaxis
    The y axis is given as the frequency density and the x axis is given as mass.
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    (Original post by badmathkid)
    How do you find the frequency in a histogram? I tried using the formula frequency density x class width = frequency but I heard something about a multiplier needed which is then multiplied by the area?

    Please help!
    the area is proportional to the frequency
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    (Original post by sarah5)
    the area is proportional to the frequency
    I see, so how would I work it out in figures?
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    (Original post by badmathkid)
    The y axis is given as the frequency density and the x axis is given as mass.
    Then i dont think u need a multiplier- never heard of that.
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    (Original post by badmathkid)
    I see, so how would I work it out in figures?
    send me the question so i can explain it
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    (Original post by N/A IS THE NAME)
    Then i dont think u need a multiplier- never heard of that.
    Someone explained to me that a multiplier is needed due to the proportionality and whenever I look at the answer it's not just simply the cw x fd.
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    Then there must a bit of info in the question that relates the mass on the y axis to the frequency they are looking for- or something like this.
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    (Original post by sarah5)
    send me the question so i can explain it
    I'm not exactly sur ehow I can attach an image of the question as it's a screenshot.
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    (Original post by sarah5)
    send me the question so i can explain it
    I've converted the images to URL links:


    https://s1.postimg.org/8j7ddg3li7/My_Math_1.png
    https://s1.postimg.org/4lezwrsskv/My_Math_2.png
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    okay for the first question
    area=k*frequency
    then you need to find k
    so you have
    the mass from 1-4
    and its width (4.5-0.5)=4
    the frequency density =0.5
    so width*fd=k*freqency (which is 10 given in the table )
    4*0.5/10 =k (0.2)

    then you need to find the frequency for 5-6 where the width (6.5-4.5)=2 and fd =4
    the frequency = 2*4/0.2 =40
    and so on ...
    hope u understand
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    (Original post by sarah5)
    okay for the first question
    area=k*frequency
    then you need to find k
    so you have
    the mass from 1-4
    and its width (4.5-0.5)=4
    the frequency density =0.5
    so width*fd=k*freqency (which is 10 given in the table )
    4*0.5/10 =k (0.2)

    then you need to find the frequency for 5-6 where the width (6.5-4.5)=2 and fd =4
    the frequency = 2*4/0.2 =40
    and so on ...
    hope u understand
    Thank you so much!! I finally understand!!
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    (Original post by badmathkid)
    Thank you so much!! I finally understand!!
    okay for the second question is the same idea
    width*fd=k*frequency
    they gave you the area and the frequency you have to find k
    and then use k to find the frequency to other weights


    I really like histograms every question has the same idea
    so dont worry if you understand this !
    <3 and good luck with your exam
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    (Original post by sarah5)
    okay for the second question is the same idea
    width*fd=k*frequency
    they gave you the area and the frequency you have to find k
    and then use k to find the frequency to other weights


    I really like histograms every question has the same idea
    so dont worry if you understand this !
    <3 and good luck with your exam
    Thanks so much! You're a life saver!! It's hard to remember and gets confusing sometimes. Thank you so much again!
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    F.d x Class width
 
 
 
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