C04 · Lesson 12 of 22 · 15 min · 5 hands-on tasks
Curves: Non-Linear Relationships
Halden spends $20,000 a month on online ads. Would $40,000 bring twice the leads? Two years of data say no: each extra dollar buys a little less. Fit straight lines, log curves and quadratics, read a log-log slope as an elasticity, and find the budget where the next dollar stops paying.
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