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y varies inversely with x. Find the inverse variation equation if x = -2 when y = 9. (Points : 1) xy = -18 xy = -9/2 y/x = -9/2 y/x = -18
y varies inversely with x. The equation is y = k/x where k is the constant. we were given x = -2 when y = 9. So k = xy = -2(9) = -18 The equation is y = -18/x Or xy = -18
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Asked 6/12/2013 12:54:48 PM
Updated 5/6/2014 9:37:12 PM
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y varies inversely with x. The equation is y = k/x where k is the constant.
we were given x = -2 when y = 9.
So k = xy = -2(9) = -18
The equation is y = -18/x
Or xy = -18
Added 5/6/2014 9:37:12 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/6/2014 9:44:48 PM]
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Questions asked by the same visitor
y varies inversely with x, and x = -12 when y = 5. Find the inverse variation equation and use it to find the value of x when y = 10. (Points : 1) -12 -6 -24 -4.2
Question
Updated 5/6/2014 9:34:43 PM
1 Answer/Comment
y varies inversely with x, and x = -12 when y = 5.
The equation is y = k/x where k is the constant,
With given value of x and y, we can get k = xy = -12(5) = -60.
The equation is y = -60/x,
When y = 10, x = -60/y = -60/10 = -6
Added 5/6/2014 9:34:43 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/6/2014 9:36:38 PM]
y varies inversely with x, and x = -10 when y = 60. Find the inverse variation equation and use it to find the value of y when x = 15. (Points : 1) -75 -90 -40 -30
Question
Updated 5/6/2014 9:39:35 PM
1 Answer/Comment
y varies inversely with x, and x = -10 when y = 60.
The equation is y = k/x where k is the constant.
With the given value of x and y we get k = x*y = -10(60) = -600.
The equation is y = -600/x
When x = 15, y = -600/15 = -40
Added 5/6/2014 9:39:35 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/6/2014 9:44:42 PM]
y varies inversely with x. Find the inverse variation equation if x = 12 when y = -18. (Points : 1) y/x = -3/2 y/x = -216 xy = -216 xy = -3/2
Question
Updated 5/6/2014 9:43:28 PM
1 Answer/Comment
y varies inversely with x. The equation is y = k/x where k is the constant. We were given x = 12 when y = -18, so k = x y = 12(-18) = -216. The equation is y = -216/x which is equal to xy = -216
Added 5/6/2014 9:43:28 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/6/2014 9:44:36 PM]
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