How would the function change if the desk were depreciating or losing value every year? Writes a linear equation. Almost There The student does not completely simplify the equation or provides an inadequate explanation.

Provide additional opportunities for the student to write exponential functions from verbal descriptions, tables of values, and graphs.

Moving Forward The student is unable to correctly calculate one or both parameters. Errs in calculating the growth factor e. Correctly uses the compound interest formula to write the function but neglects to completely simplify by substituting one for n.

Instructional Implications Provide specific feedback to the student and allow the student to revise the function or explanation.

Instructional Implications Ask the student to compare linear functions to exponential functions and distinguish between problem contexts that can be modeled by each. Have the student make a table of values for each example.

Can it be applied to this problem? Got It The student provides complete and correct responses to all components of the task. Okaloosa Is this Resource freely Available? The student does not understand the basic form of an exponential function. Why did you write your equation this way?

What is an exponential function? Questions Eliciting Thinking What is the in this problem? What does the equation of an exponential equation look like?

Examples of Student Work at this Level The student: Can you explain to me the parts of your equation? Instructional Implications Provide opportunities for the student to explore and investigate exponential functions, both growth and decay, in context.Model explaining why the function is written as V = using appropriate mathematical terminology.

Provide additional opportunities for the student to write exponential functions from verbal descriptions, tables of values, and graphs.

Jul 08, · Exponential functions can model the rate of change of many situations, including population growth, radioactive decay, bacterial growth, compound interest, and much more. Follow these steps to write an exponential equation if you know the rate at which the function is growing or decaying, and the %(1).

a) Exponential growth or decay: b) Identify the initial amount: c) Identify the growth/decay factor: d) Write an exponential function to model the situation: e) “Do” the problem: 2. From - a city had a % annual decrease in population. Feb 11, · I know that the equation is show more Write an exponential function to model the following situation.

A population ofgrows 3% per year for 14 years. A population ofgrows 3% per year for 14 mi-centre.com: Resolved. Write an exponential decay function to model this situation. Then find the number of people in the town after 25 years.

Exponential Growth and Decay Date Class 2. Writing an Exponential Function Write an exponential function y = abx whose graph passes through (1, 6) and (3, 24). SOLUTION Use a graphing calculator to find an exponential model for the data in Example2. Use the model to estimate the number of cell-phone subscribers in

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