LESSON 5 Mass vs. Number

Yolanda bakes wonderful oat bran bars. She decided to start her own business selling them. When customers send her an order, she sends them the bars by mail. The mailing cost depends on the mass of each package. Her customers order different numbers of bars. Yolanda thought, “How can I find the mass for any number of bars?”

Yolanda found the total mass of 1, 2, 4, and 8 bars. Here is her data.

1. What patterns do you see in the data table?
1. What patterns do you see if you look down the columns?
2. What patterns do you see if you look across the rows? (Hint: Use friendly numbers.)
1. What happens to the mass of the bars if the number of oat bran bars goes up by 2 bars?
2. What happens to the mass of the bars if the number of oat bran bars doubles?