y varies directly as x so y = cx for some constant c.
y = 125 when x = 25 so 125 = c*25 so that c = 5
ie the relationship is y = 5x
Then when x = 2,
y = c*x = 5*2 = 10
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y=10
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The phrase "varies directly as" means that there is a number k such that w = k(2x - 1). From the results given for w = 9 when x = 2, 9 = k(4 - 1), or k = 3. Then when w is 15, 15 = 3(2x - 1), or 15 = 6x - 3, or 6x = 15 + 3, or x = 18/6 = 3.
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Given x=k1y and x=k2/z x=125 ,y=5 then k1=25 x=125 , z=4 then k2=125(4)=500 If y=4 ,z=5 then x=25y = 100
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Capillary density within tissues varies directly with tissues' rates and metabolism.
It varies with each given number.
As x ∝ yz2 then x = kyz2 where k is a constant. Substituting the given figures, 40 = k*20*22 = 80k Then k = ½ and the formula is, x = ½yz2 So, x = ½ * 30 *32 = 135
it may not be given directly to political parties
y=10
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