ACT Math
Lesson Plan
Definition and vertical line test
Goals / Objectives
State the definition of a function: each valid input value has exactly one output value
Decide whether a set of ordered pairs, a table, or a mapping diagram represents a function, and name the specific input that breaks it when it does not
Apply the vertical line test to a graph, and explain why it is the definition rather than a separate rule
Explain why one input with two outputs violates the definition while two inputs sharing one output does not
Decide whether a described situation is a function by testing whether one input could yield two outputs
Distinguish a function that models a situation from the situation itself
Standards
F 505. Understand the concept of a function as having a well-defined output value at each valid input value F 504. Attend to the difference between a function modeling a situation and the reality of the situation G 406. Locate points in the coordinate plane
Academic Vocabulary
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Materials
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Remediation
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Enrichment
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Accommodations
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Anticipatory Set / Bell Work
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Modeling
Check for Understanding
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Guided Practice
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Independent Practice
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Homework
Pacing
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