Graph Studio

The graph point is the one students lose most often on the AP® Microeconomics exam. Graph Studio has every graph the course draws: the PPC, supply and demand, surplus and policy (price controls, taxes, subsidies and trade), the cost curves, the competitive firm beside its market, monopoly, monopolistic competition, the labor market beside its firm, monopsony, externalities and the Lorenz curve. Pick a graph, pick what happens, and draw it yourself: shift a curve, mark a point, move a price line, or tap the areas to shade. Test yourself grades every graph point by point, the way readers score it, and names the slip when a point is lost.

How it works

Explore. Choose a graph, then choose what happens. Drag the curve you think moves (or use its button and the arrow keys), tap where the point belongs, drag the price line, or tap each part of an area to shade it. The picture says at once whether you have it, and a wrong try names what you drew instead (the market quantity in place of the efficient one, the price read from MR, the rectangle that stops at the old quantity). Show me draws the answer, and Why walks through it. With nothing picked, a graph is yours to play with: tap any area to see what it is called.

Test yourself. Each problem is one graph, built one rubric point at a time: the labels (when you draw it from scratch), the shift, the new equilibrium, the price or wage line, the point, the shaded area, and sometimes a question about what the graph means. The strip on the graph ticks each point you earn on the first try. The PPC and supply-and-demand drills are free; the other graphs' drills are part of Premium, and Explore draws every graph for everyone.

Graphs are drawn on a 0 to 10 grid with straight demand and supply curves, and the cost curves come from one cubic total cost, so marginal cost always crosses AVC and ATC at their lowest points. Shift size is never graded, only the curve and its direction.

Notes for this topic: Shifts and Movements Along a Curve