This exam tips covers Exam Tips for Exponential Graphs within Exponential Graphs for GCSE Mathematics. Revise Exponential Graphs in Graphs for GCSE Mathematics with 11 exam-style questions and 10 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 7 of 10 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 7 of 10
Practice
11 questions
Recall
10 flashcards
💡 Exam Tips for Exponential Graphs
- y-intercept is always (0, 1) for y = aˣ — mark this point first when sketching
- Curve never crosses x-axis — draw it approaching but never touching the x-axis
- Growth vs decay: growth curves rise to the right; decay curves fall to the right
- For y = k × aˣ: the y-intercept is (0, k), not (0, 1)
- Compound interest: use the formula A = P(1 + r/100)ⁿ — the multiplier is (1 + r/100) for growth, (1 − r/100) for decay
- Check if exponential: calculate the ratio of consecutive terms — if constant, it is exponential