Interpreting trends on ACT Science means describing how one variable changes as another increases—direct, inverse, leveling off, or no clear pattern—using only what the graph or table shows. Wording is precise: "increases then plateaus" beats vague "goes up."
Read the axes first
Label both axes with units. Identify what is manipulated vs measured. Speed skill in reading graphs faster on ACT Science and best ACT Science strategy.
Patterns to name
- Direct increase: as X rises, Y rises
- Inverse: as X rises, Y falls
- Plateau: Y stops changing after a point
- Peak: Y increases then decreases
- No trend / scattered: no clear relationship
Answer choice discipline
The ACT loves partially true descriptions—true for part of the graph but not all. Scan the full range before you pick. Compare trials at multiple x-values, not just endpoints.
Tables vs graphs
On tables, scan down a column while tracking another. Mark direction changes row by row. For numeric follow-ups, see ACT Science calculating questions.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.