Worksheets — Set 19
Algebra I · Exponential functions (intro)
Print and write your answers. Use diagrams to show thinking.
Warm-up
1. Linear model: slope 22, through (0, 25). Write f(x) = ___ 2. Exponential: f(0)=22, growth factor 3.5. f(x)=___ 3. Which model fits: equal differences or equal ratios? ___
_See printable PDF for diagram._
Written practice
1. Linear model: slope 21, through (0, 24). Write f(x) = ___ 2. Exponential: f(0)=21, growth factor 3.4000000000000004. f(x)=___ 3. Which model fits: equal differences or equal ratios? ___ 4. Parameter meaning: in f(x)=29(0.8)ˣ, 0.8 represents ___ 5. Predict f(24) from your model: ___ 6. When does the model break down? Explain. ___ 7. Linear model: slope 24, through (0, 27). Write f(x) = ___ 8. Exponential: f(0)=24, growth factor 3.7. f(x)=___
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More written practice
1. Parameter meaning: in f(x)=32(0.8)ˣ, 0.8 represents ___ 2. Predict f(27) from your model: ___ 3. Linear model: slope 27, through (0, 30). Write f(x) = ___ 4. Exponential: f(0)=27, growth factor 4. f(x)=___ 5. Parameter meaning: in f(x)=35(0.8)ˣ, 0.8 represents ___ 6. Predict f(30) from your model: ___
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Patterns and rules
1. Linear model: slope 38, through (0, 41). Write f(x) = ___ 2. Exponential: f(0)=38, growth factor 5.1. f(x)=___ 3. Which model fits: equal differences or equal ratios? ___
_See printable PDF for diagram._
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Stretch
1. Linear model: slope 46, through (0, 49). Write f(x) = ___ 2. Exponential: f(0)=46, growth factor 5.9. f(x)=___
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Parent tip: Look at differences or ratios in tables