The answer depends on the equation!
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In a nonlinear equation, each variable must only have one solution.
that is pi.there isnt really a variable there it just looks like n
direct variation, and in the equation y=kx the k ca NOT equal 0.
y=mx+b is the equation for a linear relationship. y= the dependant variable m= the slope of the line x= the independent variable b= the y-intercept
A linear equation is when each term in the algebraic equation is either a constant or the product has a single variable and a constant.