Maths - regression analysis & line of best fit?

im doing a maths thing and im a bit lost - no idea how to use the graphics calculator (T1-84 plus). i need to draw a line of best fit on a hand drawn graph and then peform a regression analysis to find the equation of the line. iv got my hand drawn graph, and now im stuck. it says to use the graphics calculator... show more im doing a maths thing and im a bit lost - no idea how to use the graphics calculator (T1-84 plus). i need to draw a line of best fit on a hand drawn graph and then peform a regression analysis to find the equation of the line. iv got my hand drawn graph, and now im stuck. it says to use the graphics calculator for the next part, so does anyone know what your meant to even press?
help would be awesome =)
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