Math

Which equation in point-slope form gives the plant's height at any time. (x,y) (3,21) (5,35) (7,49) (9,63)
Please Help!

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  1. assuming that the slope is constant (you should check), m = (35-21)/(5-3) = 14/2 = 7
    So, pick any point, say (3,21) you get

    y-21 = 7(x-3)

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  2. What about y= - 2/3 x + 7 in standard form using integers

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  3. Huh? Did you listen to yourself?
    Not even close!

    y-21 = 7(x-3)
    y-21 = 7x-21
    y = 7x

    And besides, they asked for point-slope form.

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  4. bro ummm I was asking you that was a different question.........

    write y-21 = 7(x-3) in standard form using integers

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  5. Well, first you need to note that Standard Form is
    Ax+By = C
    So,

    y-21 = 7(x-3)
    y=7x
    7x - y = 0

    y= - 2/3 x + 7
    3y = -2x + 21
    2x + 3y = 21

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