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Reading Pictographs

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    According to the pictograph below, how many survey respondents
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    have type O positive blood ? How many have O negative blood ?
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    So pictograph is really just a way of representing data with pictures that are
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    somehow related to the data
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    So in this case they give us little pictures of am assuming blood drops
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    right over here
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    And they tell us
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    each blood drop
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    each blood drop in this pictograph represents 8 people
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    so you can kinda view that as the scale of these graphs
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    Each of this is 8 people
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    So, For Example
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    You say how many people have A positive would be
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    1, 2, 3, 4, 5 , 6 , 7 blood drops
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    but each of those blood drops represent 8 people, so it would be 56
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    people have type A positive
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    But, lets answer the actual question that they are asking us
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    How many survey respondents have type O positive
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    O Positive
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    So this is O and then we care about O positive
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    So we have, 1 blood drop, 2, 3
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    Let me just do this in a new different color.
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    We have 1, 2, 3, 4, 5, 6, 7, 8
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    So we have 8 drops
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    I'll put those in quotes cause of the pictures of drops
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    and then the scale is,the scale is 8 people. 8 people
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    Let me write it this way
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    Times 8 people per drop
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    8 people per drop
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    and so, 8 times and 8 and actually the drops you can view them as cancelling out
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    if you view them as units
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    so drops, drops
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    8 times 8 is equal to 64
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    64 people
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    So they could have literally written the number 64 right over here
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    64 People have type O positive blood
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    So now lets think about the O negative case
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    O negative blood
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    Well this is O and then within the blood group O
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    This is O negative
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    and we have 1 drop, 2 drops
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    So we have 2 drops
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    Two Drops
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    Times 8 people per drop
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    8 people per drop
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    so 2 times 8.
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    each of these represent 8
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    So 8 and then 16
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    Or, 2 times 8 is equal to 16, 16 people
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    so 16 of the survey respondents
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    16 have type O negative and 64 have type O positive
Title:
Reading Pictographs
Description:

u08_l1_t1_we1 Reading Pictographs
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Video Language:
English
Duration:
02:21
nidihudi added a translation

English subtitles

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