question: returns the number of data points . concode_field_sep BigDecimal sumXY concode_elem_sep BigDecimal sumY concode_elem_sep long dataPoints concode_elem_sep BigDecimal sumX concode_elem_sep BigDecimal sumXSq concode_elem_sep BigDecimal sumYSq concode_elem_sep long serialVersionUID concode_field_sep void setSumXSq concode_elem_sep BigDecimal getXStandardDeviationSample concode_elem_sep void setSumYSq concode_elem_sep void removePoint concode_elem_sep void removePoint concode_elem_sep BigDecimal getXAverage concode_elem_sep BigDecimal getYAverage concode_elem_sep BigDecimal getYSum concode_elem_sep long getDataPoints concode_elem_sep BigDecimal getXStandardDeviationPop concode_elem_sep BigDecimal getSumXSq concode_elem_sep BigDecimal getSumYSq concode_elem_sep BigDecimal getYStandardDeviationPop concode_elem_sep void setSumY concode_elem_sep BigDecimal getSumY concode_elem_sep BigDecimal getSumX concode_elem_sep void addPoint concode_elem_sep void addPoint concode_elem_sep BigDecimal getXSum concode_elem_sep BigDecimal getYVariance concode_elem_sep BigDecimal getXVariance concode_elem_sep void setDataPoints concode_elem_sep Object clone concode_elem_sep BigDecimal getYStandardDeviationSample concode_elem_sep String toString concode_elem_sep void initialize concode_elem_sep void setSumXY concode_elem_sep BigDecimal getSumXY concode_elem_sep void setSumX
target: long function ( ) { return dataPoints ; }