There are three different ways of analyzing the light intensity data. Explore one or more of the following methods:

Families of Functions	Difference Equations	Linearizing Data

Families of Functions

Use sliders to change the values of parameters a, b and c in different functions such as y = a*x + b to fit the function. Choose from the existing functions or enter your own function.

Difference Equations

Use relationships observed graphically between the change in light intensity and the current light intensity to create a difference (or recurrence) equation to model the situation.

Linearing the data

Use properties of exponential functions to test if the data is exponential by transforming the data.

Make a Conjecture	Gather Data	Analyze the Data	Reflect on your work

Back to the beginning of this i-Math Investigation

References and Credits