Kord is enlarging a picture to make a banner for the football team. He plans to repeatedly enlarge the picture 125% each time until it is the size he wants for his banner. The size of his picture can be modeled by the function [math]P(x) = 1.25^{x}[/math], where [math]x[/math] is the number of times the picture has been enlarged. Find the rate of change of the picture size between the first and third enlargement.
[list=1] [*]Find the corresponding [math]y[/math]-values for the given [math]x[/math]-values. [*]Use the formula [math]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/math] to calculate the rate of change. [/list] This applet is provided by Walch Education as supplemental material for the [i]UCSS Secondary Math I[/i] program. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on our resources.