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Laabri

(U2) Lesson 6 - Getting down to business

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Last updated about 3 years ago
8 Nsɛmmisa

Today's Learning Goal:

  • Model both linear and exponential functions with tables, graphs and equations.

  • Compare the end behavior of linear and exponential functions and make arguments about why exponential functions eventually exceed linear functions.

  • Make modeling decisions about whether a discrete or continuous model is more appropriate.

  • Interpret the point of intersection of two functions as the value that occurs when f(x) = g(x).

Reminders:

Discrete functions have distinct and separate values and are used for things that can be counted. (countable)

Continuous functions can have any value within a specific interval and values are connected. (measureable)

Domain of a function: The numbers that can be used as possible inputs

Today's Materials:

  1. Laptop

  2. Pencil

  3. Binder

Please complete the Jump Start (activator). This is independent it should be silent.

QUICK QUIZ 2 - 15 Minutes

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Practice

Learning Focus:

  • Make modeling decisions about business plans.

  • Interpret mathematical models to make business decisions.

  • Determine which type of function grows faster and make arguments about why.

Which type of function increases faster—linear or exponential? Which model is best for a given situation, discrete or continuous?

How can mathematical models help to make business decisions?

Calcu-rama had a net income of $5 million in 2020, while a small competing company, Computafest, had a net income of $2 million.

The management of Calcu-rama develops a business plan for future growth that projects an increase in net income adding $0.5 million per year, while the management of Computafest develops a plan aimed at increasing its net income by 15% each year.

Asemmisa {{asɛmmisaAhyɛnsode}}
1.

Click the parts of the text that are most important mathematically.

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2.

Create standard mathematical models (table, graph, and equations) for the projected net income over time for both companies.

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3.

Compare the two companies:

Categorize the facts about each company based on the representations.

  • Graphs: Exponential Curve: Increases slowly in the first few years and then rises quickly.

  • Function Type: Exponential

  • Tables: Increases at 15% per year, making a constant ratio of 1.15.

  • Equations: The constant ratio of 1.15 is the base of the exponential.

    The initial value of 2 is multiplied.

  • Tables: Increases at a constant rate of 0.5

  • Function Type: Linear

  • Equations: 0.5 is the slope (Common difference),

    Y-intercept is 5 (Starting value)

  • Graphs: Straight line - Constant increase each year.

  • Calcu-rama

  • Computafest

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

If both companies were able to meet their net income growth goals, which company would you choose to invest in? Why?

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5.

Which company would make most money after 8 years?

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6.

When would your projections suggest that the two companies have the same net income? How did you find this? Will they ever have the same net income again?

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7.

Which company would make most money after 14 years?

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8.

Why did we model as discrete or continuous? Explain.