2.1.978 Part 1 Section 18.104.22.168, LOGEST
a. The standard specifies the equation for the curve is y = b * mx or y=b*(m1*x1)*(m2*x2)*...) if there are multiple values
Office uses the following equation for the curve: y = b * (m^x) or y=b*(m1^x1)*(m2^x2)...(mn^xn) if there are multiple values
b. The standard does not place any restrictions on dimensions of known-ys or known-xs.
In Office, if known-ys and known-xs are not the same size, or known-ys does not contain exactly one value for each row or column of known-xs, #REF! is returned.
c. The standard specifies the following syntax: LOGEST ( known-ys [ , [ known-xs ] [ , [ const-flag ] [ , stats-flag ] ] ).
Office uses the following syntax: LOGEST ( known-ys [ , [ known-xs ] [ , [ const-flag ] [ , [ stats-flag ] ] ] ] ).