Trendline: Draw the Line

Every day, Trendline shows you something real (how the price of oil moved, how a country's population grew, how many people named Karen there are at each age) and hides the answer. You drag a line across a blank chart to draw what you think happened. Then the real data appears, with one honest score and the story behind it. DAILY ROUNDS A fresh puzzle in each of five themes, every day: • World: climate, markets, the economy, technology, nature and space • People: population, sport, culture and society • Ages: draw how a group is spread across ages, from people named Jennifer to Olympic skiers to the users of an app, against everyone else • Sunday Special: one line is drawn for you, you draw the other, and the reveal tells you whether the two things are really connected or only look it • Maths: draw the graph of a function like y = x² + 3x + 1 and get it graded like homework, A+ to F−.…