Question

if Y varies inversely as X , when Y=4 and X=15 .?
if Y varies directly as X, when Y=24 and X=3 ?

Answer 1

\[y(x)\propto \frac1x\]\[\qquad\Downarrow\]\[y(x)=\frac kx\]

Answer 2

\[k=y(x)*x\]

Answer 3

For the second one,

\[y \ \alpha \ x\]

\[y=kx=>k=y/x\]

Answer 4

now just substitute in the values of \(x,y\) to find the constant of proportionality \(k\)

Answer 5

do you understand @doton01? have you found k?

Answer 6

wait huh. :
)

Answer 7

We have been waiting for about half an hour i guess :/

Answer 8

can u answer . i cant .

Answer 9

please ?

Answer 10

\[k=y(x)\times x\] \[\quad\qquad y=4 \text{ and }x=15 \]
\[k=4\times15\]

Answer 11

k=60

Answer 12

\[k=4(15)\times 15 ?\]

Answer 13

yeah 60 is right

Answer 14

that is the answer ?? 60 ?
-doton01