If: 5 = x-y
Then: y = x-5
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Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
zeros values at which an equation equals zero are called roots,solutions, or simply zeros. an x-intercept occurs when y=o ex.) y=x squared - 4 0=(x-2)(x+2) (-infinity,-2)(-2,2) (2,infinity)
that would be limited to 3 and -3 for values of x
That is an impossible equation, because it is stating that m has two values.
There is no property that justifies it. The equation is true for some values of x, not for others.