If f'(x) is positive on an interval, what does that say about f?
f is increasing on that interval.
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AP Calculus AB
For AP Calculus AB 2026, prioritize derivative interpretation, accumulation, differential equations, graph/table translation and justification language.
Structure signal
AP Calculus AB has 45 multiple-choice questions in 105 minutes and 6 free-response questions in 90 minutes, split into calculator and non-calculator parts.
AP Calculus AB Exam - AP CentralFocus areas
Original practice
If f'(x) is positive on an interval, what does that say about f?
f is increasing on that interval.
What does the integral of a rate function over time represent?
The accumulated change in the original quantity over that time interval.
If dy/dx = ky and k is positive, what general behaviour should be expected?
Exponential growth, assuming y starts positive.