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GogRegCurve;
GogRegCurveClass;
gcharconst * gog_reg_curve_get_equation (GogRegCurve *reg_curve);
double gog_reg_curve_get_R2 (GogRegCurve *reg_curve);
void gog_reg_curve_get_bounds (GogRegCurve *reg_curve,
double *xmin,
double *xmax);
typedef struct {
GogTrendLineClass base;
double (*get_value_at) (GogRegCurve *reg_curve, double x);
char const * (*get_equation) (GogRegCurve *reg_curve);
void (*populate_editor) (GogRegCurve *reg_curve, gpointer table);
} GogRegCurveClass;
gcharconst * gog_reg_curve_get_equation (GogRegCurve *reg_curve);
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void gog_reg_curve_get_bounds (GogRegCurve *reg_curve, double *xmin, double *xmax);
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