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Course 13 of 15 · 11 lessons

Math for Economics

Can you read the formula behind the chart? Eleven lessons on the little math that every other course uses and never had time to explain: what a slope is, where two lines cross, why growth multiplies, what “marginal” means, why a maximum has a flat slope, why surplus is an area. Lia draws every idea, Sam writes it as a formula, and the two must agree. No other lesson is needed first. Toy numbers only, and nothing to buy.

11 LESSONS ONLINE
15-MIN LESSONS
BUILDS ON THE OTHER COURSES
ELEVEN TOOLS TO READ ANY FORMULA

1Why is a demand curve a line?
Lines: a start and a slope · about 15 min

5 exercises + flashcards Summary PDF

2Where do two lines cross?
Two equations: the equilibrium, a shift and a tax · about 15 min

5 exercises + flashcards Summary PDF

3How fast is it growing?
Growth, the rule of 70 and the log · about 15 min

5 exercises + flashcards Summary PDF

4What does “marginal” really mean?
Slopes and the derivative · about 15 min

5 exercises + flashcards Summary PDF

5Where is the top of the hill?
The maximum and MR = MC · about 15 min

5 exercises + flashcards Summary PDF

6How big is the triangle?
Areas, surplus and deadweight loss · about 15 min

5 exercises + flashcards Summary PDF

7Why does elasticity need a percentage?
Elasticity: point, midpoint and revenue · about 15 min

5 exercises + flashcards Summary PDF

8How do you choose with a budget?
The budget line and the best bundle · about 15 min

5 exercises + flashcards Summary PDF

9What is $110 next year worth today?
Present value and the series 1 ÷ (1 − x) · about 15 min

5 exercises + flashcards Summary PDF

10How likely is it?
Probability and expected value · about 15 min

5 exercises + flashcards Summary PDF

11Can you read any formula?
Read it, draw it, check one number · about 15 min

5 exercises + flashcards Summary PDF

Finished the eleven lessons? Go on to the fourteenth course, Microeconomics 2.