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Mariulka [41]
3 years ago
11

Will mark Brainlyist help me fill out the chart

Mathematics
1 answer:
Zigmanuir [339]3 years ago
8 0

Answer:

The working is done in the image attached.

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Y varies directly as x when x= 3 and y =12 find y when x =12
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\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad  y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad  variation
\end{array}\\\\
-------------------------------\\\\
\textit{we know that }
\begin{cases}
x=3\\
y=12
\end{cases}\implies 12=k3\implies \cfrac{12}{3}=k\implies 4=k
\\\\\\
thus\qquad \boxed{y=4x}
\\\\\\
\textit{when x = 12, what is \underline{y}?}\qquad \qquad y=4(12)
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