4.2+Using+Unit+Rate+1011

M.J. (Madina Jumabaeva) Math 7B November 29, 2010 Comparing and Scaling

__Big Idea:__ Many important practical and mathematical applications involve comparing quantities of one kind or another; it is important to know which method to use and how we should use them.

__Investigation 4 Essential Question: __ How can I use a unit rate to make a prediction?

**__Problem 4.2- Using Unit Rates __**



When Madeline and Luis compared the fuel economy of their new cars, they found these rates:  Madeline's car=580 miles with 19 gallons of gas  Luis's car= 452 miles with 15.5 gallons of gas

 Use this information to answer the folowing questions.  A) Unit rates: Madeline's car went 30.5 miles/gallon, and Luis's car went 29 miles/gallon. So Madeline went the most miles per gallon.

 B)
 * Gallon of gas || 0 || 1 || 2 || 3 || <span style="font-family: 'Comic Sans MS',cursive;">4 || <span style="font-family: 'Comic Sans MS',cursive;">5 || <span style="font-family: 'Comic Sans MS',cursive;">6 || <span style="font-family: 'Comic Sans MS',cursive;">7 || <span style="font-family: 'Comic Sans MS',cursive;">8 ||
 * <span style="font-family: 'Comic Sans MS',cursive;">Miles in Madeline's car || <span style="font-family: 'Comic Sans MS',cursive;">0 ||  ||   ||   ||   ||   ||   ||   ||   ||
 * <span style="font-family: 'Comic Sans MS',cursive;">Miles in Luis's car || <span style="font-family: 'Comic Sans MS',cursive;">0 ||  ||   ||   ||   ||   ||   ||   ||   ||