Solutions892.7. (a)The scatterplot is on the right.(b)Bobax is the second point from the right.(Bobax has the second-highest bot count with185 thousand, but is relatively low in spammessages at 9 billion per day.)0102030405060050100150200250300350Spams per day (billions)Bots (thousands)Bobax2.8. (a)The resulting spreadsheet isnot shown.(b)Scatterplot on theright.(c)The points are arrangedexactly as before, but the largenumbers on the axes are distracting.010,000,000,00020,000,000,00030,000,000,00040,000,000,00050,000,000,00060,000,000,0000100,000200,000300,000Spams per dayBots2.9.Size seems to be the most reasonablechoice for explanatory variable because itseems nearly certain that Starbucks first de-cided which sizes to offer, then determinedthe appropriate price for each size (ratherthan vice versa). The scatterplot shows apositive association between size and price.