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 one year ago
Determine whether y varies directly with x. If so, find the constant of variation k.
3y = –7x – 18
 one year ago
Determine whether y varies directly with x. If so, find the constant of variation k. 3y = –7x – 18

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ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2@agent0smith

agent0smith
 one year ago
Best ResponseYou've already chosen the best response.1For the constant of variation, we need it to look like y = kx. Let's divide both sides of 3y = –7x – 18 by 3, to get \[y = \frac{7 }{ 3 }x –\frac{ 18 }{3 }\] Try comparing \[y= kx \]to\[y = \frac{7 }{ 3 }x –\frac{ 18 }{3 }\]

ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2so is the answer B?

ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2@agent0smith

agent0smith
 one year ago
Best ResponseYou've already chosen the best response.1But notice that we have\[ y = \frac{7 }{ 3 }x –\frac{ 18 }{3 } \] Does it look like y=kx? or y=kx minus 18/3?

ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2no they don't so its D

agent0smith
 one year ago
Best ResponseYou've already chosen the best response.1For constant of variation, you only want y = kx, not y = kx plus or minus some number.

ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2so there is no constant of variation its no

agent0smith
 one year ago
Best ResponseYou've already chosen the best response.1Correct :) *If* it was just \[y = \frac{7 }{ 3 }x\] then it would be in the form y = kx.

ihavemathquestions
 one year ago
Best ResponseYou've already chosen the best response.2thanks baby xo
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