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Interpolation and extrapolation — ACT practice questions
Interpolation and extrapolation on the ACT Science test covers estimating values that are not listed as exact data points. Students must interpolate by reading a value between known points on a table, graph, or figure, and extrapolate by extending a trend beyond the given range. They have to pick the right variables, honor axis scales, and judge whether the target sits inside or outside the displayed data. Questions usually attach a figure and offer nearby numerical estimates or competing trend claims as choices. Traps include the wrong series or axis, treating a curve as a straight line, and assuming a pattern keeps the same slope past the last plotted point.
- Section: Science 40 questions on the paper
- 76 practice questions in the app
Practice 76 Interpolation and extrapolation questions in the app
More ACT topics
Science
- Reading values from tables, graphs, and diagrams
- Recognizing relationships and trends in data
- Translating between tables and graphs
- Experimental design, tools, and procedures
- Identifying controls, variables, and hypotheses
- Comparing and interpreting results across experiments
- Predicting and extending experiments
- Summarizing competing hypotheses/theories
- Comparing and contrasting alternative viewpoints
- Evaluating support for each viewpoint
- Reasoning mathematically about data
- Judging validity / evaluating hypotheses
- Formulating evidence-supported conclusions
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