What is the frequency of the wave? ?

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?