/// <summary>
/// Determines whether this equation can be plotted using the specific given variables. If calling this
/// method with parameters <c>'x'</c> and <c>'y'</c> on an Equation such as <c>y=x+1</c> will return true,
/// however calling it with the same parameters on an equation such as <c>a=3b-7</c> will return false,
/// as the equation does not equate those two variables.
/// </summary>
/// <param name="variable1">A variable plotted on an axis of a Graph.</param>
/// <param name="variable2">A variable plotted on an axis of a Graph.</param>
/// <returns>Returns whether this plottable resource can be plotted over the given variables.</returns>
public bool CanPlot(char variable1, char variable2)
{
if (ParseTree == null)
{
Parse();
}
return(ParseTree.CanPlotOverVariables(variable1, variable2));
}
