Algebra

For the data in the table does y vary directly with X if it does write an equation for the direct variation.
X Y
8 11
16 22
24 33

A. Yes;y=2.75x ***
B. Yes;y= 0.6875x
C. Yes;y=1.375x
D. No; y does not vary directly with x

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  1. if y varies directly with x, then it must have the form
    y = mx , (no constant like in y = mx + b )

    evaluate 11÷8 , then 22÷16, then 33÷24
    Care to re-evaluate your choice ?

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  2. Y/X = 11/8.
    Y/x = 22/16 = 11/8.
    Y/X = 33/24 = 11/8.
    When X was doubled, Y doubled.
    When X was tripled, Y tripled.
    Therefore, Y varies directly with X.
    Y/X = 11/8.
    8y = 11x,
    Y = ?

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  3. sO whAtS thE anSwer??

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