Algebra 2 quiz: Exponential growth & decay

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What this quiz should check

Topic: Exponential growth and decay functions (F-LE.A.1, F-IF.C.8b). A good Algebra 2 quiz on this asks students to:

• Tell linear from exponential change in a table, graph or situation (equal differences vs. equal factors)
• Write and interpret y = a(b)^x, including the initial value and growth or decay factor
• Convert between a growth factor and a percent rate, such as b = 1.05 meaning 5% growth
• Solve real-world problems such as interest, population and half-life

Misconceptions worth a question

• Writing 5% growth as b = 0.05 or b = 5 instead of b = 1.05
• Treating repeated multiplication as repeated addition
• Thinking a decay graph eventually reaches zero instead of approaching it

Teacher tip: Give one table and ask students to decide linear or exponential and prove it with differences or ratios. It separates real understanding from pattern guessing.

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Teach it first

Plan the lesson on the same standard: objective, practice, differentiation and an exit ticket.

Algebra 2 Exponential growth & decay lesson plan prompt →