Logarithmic projection

[#1]

Please does anyone know if there is a logarithmic projection function similar to LINEST function of Excel? Example: I need to know a tendency of selling a period from January to April, it is positive or negative and that the slope of this trend.

EXEMPLA

PERIOD	1	2	3	4
	JAN	FEB	MAR	APR	Logarithmic projection
Sale Value	10000	11000	9000	15000	1,106910125

[JonnyPoole]

there is. see screenshot of in-product help topic that covers multiple versions of the linest function for QLIK: