public override string ToString()
{
var result = "y = " + Slope.ToInvariantString() + "x";
if (YIntercept.IsApproximately(0))
{
return(result);
}
if (YIntercept < 0)
{
result += " - " + (-YIntercept).ToInvariantString();
}
else
{
result += " + " + YIntercept.ToInvariantString();
}
return(result);
}