Chart is showing wrong Equation for Trendline

[#1]

Hi

Plz see the attached file. Equation is wrong in the chart for linear regression. M is correct but b is wrong, also the format shows wrong so perhaps its rela.   

[Clever_Anjos]

I´ve just noticed same behaviour.

If I plot a line with linest_m and linest_b both lines align, it seems that the 'show equation' is buggy