1^st Hour Topics 1 Name: _________________________________

Applying Ratios and Rates

In Class/Homework 9-18-06

1) Gina is practicing her typing skills. On her first trial, she typed 72 words in 3 minutes. On the second trial, she typed 96 words in 4 minutes.

a) Based on the above information, did Gina type at the same constant rate during both of her trials? If yes, what was it? If no, what were her individual rates?

b) Graph the two trials on a coordinate plane where the x axis is the number of minutes Gina types for and the y axis is the number of words Gina types. Draw in the line that models the number of words that Gina can type after x minutes.

c) Using the line drawn in part b, estimate the number of words Gina can type in 2.7 minutes.

d) Write an equation that represents the number of words Gina can type in x minutes.

e) Using the equation found in part b, find the exact number of words Gina can type in 2.7 minutes