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douglas12
 2 years ago
Determine whether y varies directly with x. If so, find the constant of variation k.
–7y = –3x
A. yes; 3/7
B. yes; 7/3
C. yes; 3
D. no
douglas12
 2 years ago
Determine whether y varies directly with x. If so, find the constant of variation k. –7y = –3x A. yes; 3/7 B. yes; 7/3 C. yes; 3 D. no

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Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.1First ask yourself  what is the formula for Direct Variation? When you google this  you'll find that this formula is shown as \(\large \color{green}{ y = kx}\). We've got \(\large \color{red}{7y=3x}\) How do we change this to fit the form of direct variation? We divide both sides of the //equation by 7 \[\large \cfrac{7y}{7} = \cfrac{3}{7}x\] Simplifying both sides of the equation, what do we get?

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.1That's good. \[\large y=\color{blue}{\cfrac{3}{7}}x\]\(\large \cfrac{3}{7}\) is out "k" value.
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