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

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]

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

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

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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