If y varies directly as x and #y=28# and #x=18#, how do you find y when #x = 9#?

Answer 1

#y=14#

#"the initial statement is "ypropx#
#"to convert to an equation multiply by k the constant"# #"of variation"#
#y=kx#
#"to find k use the given condition"#
#y=28" when "x=18#
#y=kxrArrk=y/x=28/18=14/9#
#"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=14/9x)color(white)(2/2)|)))#
#"when "x=9" then"#
#y=14/cancel(9)xxcancel(9)=14#
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Answer 2

To find y when x = 9 in a direct variation, use the formula y = kx, where k is the constant of variation. First, find the value of k using the given values: k = y/x. Then, substitute the values of k and x into the formula to find y. The solution is y = 14.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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