0
y=54 if x=6
so we can write
y=9(x)
so y=k(x)
clearly y is directly proportional to x.
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Lao
Professor
Taigay=54 when x=6
Therefore, y= 9x
y=kx, where k is any constant, so y varies directly with x.
Actually, there is not enough information to say that y is proportional to x. There are infinite functions that go through this point.
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Let y 21 and x 1.5 if y varies directly with x find y when x 9?
No
What is the constant of variation if y varies directly with x and if y equals 500 when x equals 10?
50
If y varies directly as x what is the value of y in these ordered pair 8 4 and 4 y?
It is 2.
If y Varies Directly as x to the 2nd power and y equals 198 when x equals 6 find y when x equals 2?
y=kx^2 hence k=198/36. now y=198/36*(2)^2 y=22
X varies directly with y and inversely with z x equals 0.25 y equals 10 and z equals 20 find x when y is 20 and z is 10?
1
y varies directly with x. if y=-4, find y when x=-6?
think back to elementry
What is the direct variation equation if f(x) varies directly with x and f(x) 18 when x 3?
It is f(x) = 6*x
If y varies directly as x and y equals 18 when x equals 3?
y varies directly as x y=kx, where k is a constant y=18 when x=3 18=3k k=6 y=6x
If y varies directly as x and y is 6 when x is 72 what is the value of y when x is 8?
y is 2/3.
What is the constant of variation k if x .5 and y 1 Assume y varies directly as x?
If y varies directly as x then k = 2.
If y varies directly as x squared find k when x 2 and y 8?
If y varies directly as x and if x = 2 when y = 8 then k = 4.
If y varies directly x squared find k when y -9 and x-1?
-8
If x varies directly as y and x equals 24 when y equals 6 Then find x when y equals 8?
x = y/k: 24 = 6/k so k = ¼; when y = 8, x = 8/¼ = 32
If y varies directly as x and y 18 when x 24 find x when y 15?
If y varies directly as x and y is 18 when x is 24, then y is always three fourths of x. So if y is 15, then x is 20.
If y varies directly as x and y 36 x 9 then what is the value of x when y 12?
If y varies directly as x and y is 36 when x is 9, then y is always four times the value of x. So if y is 12, then x is 3.
What is the equation when Y varies directly as z and inversely as x?
Y = K (z/x)
Let y 21 and x 1.5 if y varies directly with x find y when x 9?
No
