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What's on the worksheet
- Find values of compositions of the identity and a constant function.
- Decide whether each set of points could come from the identity, a constant function, or neither.
- Sketch the identity and a constant function on one grid and find where they cross.
- Write each number trick as a rule and say if it is the identity or a constant function.
- Gift card problem: describe the function for a card loaded with v dollars.
- Find the value of t that makes a line through two given points fit a condition.
- Reflect a point in the line y equals x and find a and b.
- Explain why each constant function crosses the identity function exactly once.
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The free lesson teaches it with worked examples and practice problems.
The identity and constant functions: the lesson ›More Chapter 3 worksheets: Functions: notation, domain, range, graphs and linear models
- 3.1Function notation in a real situation
- 3.2Evaluating a function at an expression
- 3.3The identity and constant functions
- 3.4Domain and range from a graph
- 3.5A reasonable domain for a real situation
- 3.6End behavior
- 3.7Average rate of change from a table or graph
- 3.8Average rate of change from a formula
- 3.9Linear functions in context
- 3.10Solving f(x) = g(x) with graphs and tables
- 3.11Point-slope form and the line through two points
- 3.12Standard form of a line
- 3.13Modeling with linear relationships