4.2+Using+Unit+Rate

9/2/09 RG Big idea: Essential Question:

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

Use this information to answer the following questions

__Problem 4.2__ A. For each car, find a unit rate describing the mileage. Which ar got better gas mileage? In other words, whih car went more miles per gallon of gas?

B. Complete a table, showing the fuel used and the miles covered by eah ar based on the rates you found in part A. We call this kind of a //rate table.//

C. Look at the patterns in your table. for each car, write an equation for a rule you can use to predict the miles driven (//m)// from the gallons of gas used (g).

D. Use the rules you wrote in part C to find the number of miles eah car ould cover if it used 9.5, 15.5, 19, 23.8, 100, 125 and 150 gallons of gasoline.

__Follow Up__

1. Use your data from B or D to sketch graphs of the (galllons, miles) data for each car.

2. How are your two graphs alike? How are they different?

3. what do you think makes the two graphs different?

__Notes__:**