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marigirl
 one year ago
I am trying to model a cubic graph:
I want it to pass through the origin, x=60 and x=120. So far I have:
y=kx(x60)(x120).
i also want it to have a point (30,12). I tried to find a k value (1/4500) but it is not giving me the point i wanted?! help plz!!
marigirl
 one year ago
I am trying to model a cubic graph: I want it to pass through the origin, x=60 and x=120. So far I have: y=kx(x60)(x120). i also want it to have a point (30,12). I tried to find a k value (1/4500) but it is not giving me the point i wanted?! help plz!!

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freckles
 one year ago
Best ResponseYou've already chosen the best response.1so the cubic goes through (30,12)? if so replace y with 12 and x with 30 and solve for k

freckles
 one year ago
Best ResponseYou've already chosen the best response.1or is that what you did?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1Try solving one more time...you should be getting a different k value

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so you got it now? it is easy to screw up the arithmetic :p
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