func (prs PolynomialRegressionSeries) GetYAxis() YAxisType {
	return prs.YAxis
}
GetYAxis returns which YAxis the series draws on.
package chart
import (
	"fmt"
	"math"
	"github.com/wcharczuk/go-chart/matrix"
)
var (
	_ Series              = (*PolynomialRegressionSeries)(nil)
	_ FirstValuesProvider = (*PolynomialRegressionSeries)(nil)
	_ LastValuesProvider  = (*PolynomialRegressionSeries)(nil)
)
type PolynomialRegressionSeries struct {
	Name  string
	Style Style
	YAxis YAxisType
	Limit       int
	Offset      int
	Degree      int
	InnerSeries ValuesProvider
	coeffs []float64
}
func (prs PolynomialRegressionSeries) GetName() string {
	return prs.Name
}
func (prs PolynomialRegressionSeries) GetStyle() Style {
	return prs.Style
}