Wenn "y" umgekehrt proportional zu "x" und "y" = 15 ist, wenn "x" = 5 ist, wie lautet der Wert von "y", wenn "x" = 25 ist?

Antworten:

$y=3$

Erläuterung:

$"the initial statement is "yprop1/x$

$"to convert to an equation multiply by k the constant"$
$"of variation"$

$rArry=kxx1/x=k/x$

$"to find k use the given condition"$

$y=15" when "x=5$

$y=k/xrArrk=yx=15xx5=75$

$"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=75/x)color(white)(2/2)|)))$

$"when "x=25" then"$

$y=75/25=3$