what would be the constant variation of this direct variation: 5y = 13x  ???
143753
To find the constant of variation get y by itself by dividing both sides of the equation by the number in front of y.  This gives\n\ny = 13/5 x\n\nThe number in front of x will be the constant of variation (13/5).
618786
see this 4^5$32@* ghh4$)--==Y7^6hnyntt%5$$%%44557 b7B7g77&765&yY\nis = to none, now happy
302953
5y(y^2 - 5xy - 14x^2)\n\nIf you're expanding, you get:\n\n5y^3 - 25xy^2 - 70yx^2\n\nIf you're factoring, you get:\n\n5y(y^2 + 2xy - 7xy - 14x^2)\n= 5y( y(y+2x) - 7x(y+2x) )\n= 5y(y + 2x)(y - 7x)
820734
direct variation equation is y=xk  (whereby "k" is constant) \n\ny=21    x=7  (sub these numbers into the equation)\n\n21=7k\n\nsolving for k\nk=3
622930
Inverse variation  y = k/x therefore k = yx\nk is a constant so both cases equal the same k so set them equal to each other...\n-2(8) = 2/3 x\n-16 = 2/3 x\n-48 = 2x\n-24 = x\n\ntosmith
789216
Try to find a trend in the table.  For example if the table were to tbe like x: 5, 6, 7 for y: 8,10,12, respectively.  Then, go from y to x and try to find some eqation that fits.  For the example, it would be 8 = b + 5m (in which be is some number that gets added to y and m is the constant slope).  The other equation would be 10 = b + 6m, in which b = 10 -6m.  Thus, since the b in the first equation and the second are the same, substitute.  8 = (10 - 6m) + 5m.  8 = 10 - m.  m = 2.\nFind b now by plugging in m.  8 = b + 5(2).  b = -2.\nThus, the equation is y = 2x - b.
764937
I think the best answer would\nbe to give y in terms of x.\nThis is :\ny = (6302869x^2 - 384932345355.22x - 59096) / (231689354x + 23431653.57948)
8794
5t+1>3t-13\n-> 5t-3t>-13-1\n-> 2t>-14\n-> t>-14/2\n-> t>-7\nKeep Asking
849727
Solve for y to get it in y = mx + b form.  Then the slope is m.\n\n1) 2x - y = 14\n\nSubtract 2x from both sides:\n-y = 14 - 2x\n\nDivide by -1:\ny = 2x - 14\n\nSo the slope is 2.\n\n2) 13 = 20x - 5y\nSubtract 20x from both sides:\n13 - 20x = -5y\n\nDivide both sides by -5:\ny = 4x - 13/-5
81607
z = kxy/w where k is the constant of proportionality
1116823
Isolate your variable by dividing by -3 to get -5 for y.\n\nsubtract 8 and divide by -1 to get -4 for r.
336054
T=RV \nT=4\nV=8\n 4=8R\n\nR = 4/8 = 0.5 = R
744580
10y=15y   subtract 10y from each side\n5y=0   divide by 5.\ny=0
921168
is there a typo in the first equation?\n---\n\nthe idea is to find a common multiple for one of the variables x and y so that we can "get rid" of it. one way to do that is the following:\n\nmultiply first equation by 2 to obtain \n -14x + 12y = 84     --- (3)\n\nmultiply second equation by 3 to obtain\n -9x + 12y = 84       --- (4)\n\nnow the multiples of y in both equations are the same. we can proceed to "get rid" of y\n\ndifference of equations (3) and (4):\n       -14x + 12 y = 84\n     - (-9x  + 12y = 84 )\n-----------------------------\n        -5x             = 0\n\nthus x = 0\n\nnow substitute x = 0 into either the first or second equation and you'll get y = 7
282740
y=Mx+b\nSubstitute for y and x with given poiunts:\n\n1 = m(-13) + b\n\nSubstitute for m\n\n1 = 4(-13) + b\n\nSolve\n\n1 = -52 + b\n\n53 = b
936135
The slope is 5 (I'm giving you correct on that although it's been over 40 years and I forget).  The constant variation is x.  x can have any value and the y will be 5 times as great which is how you plot the slope.  I seem to recall that direct variation might be in response to another item.  In this case it would also be true since x varies as 1/5 of y.  Check your text for the definitions.  As I said, 40 years since I had to define those terms.
819723
"y varies inversely as x" means y = k/x, where k is the variation constant.  When x =6, y=12.  Plug those numbers in to get\n\n12 = k/6\nNow solve for k:  k=72, that is the value of the variation constant.