Page 191 - 8th Grade IM flipbook

3.2 Synthesis: Weight and Fuel Eciency
Card 12 of 26
Let's share our thinking about the last two questions.
How did you nd the automobile with the greatest weight?
How did you nd the automobile with the greatest fuel eciency?
The data in this table is from automobiles that run solely on gasoline. Where do you think a hybrid car would appear on the graph?
Did the scatter plot match your prediction?
Teaching notes
Pacing: 15 minutes for entire activity
This entire activity spans 7 cards. This is card 7 of 7. Activity Synthesis
The purpose of the discussion is for students to compare pairs of data in both representations and to begin thinking about trends in the data.
Ask students to share their thinking about the last two
questions.
Draw out the fact that cars N and O seem to t the overall trend that an increase in mass typically corresponds to a decrease in fuel eciency but cars F and G don't t that trend when compared with each other.
Mention that we will see many examples of trends that don't necessarily apply to individuals in a population.
Consider asking some of the following questions to conclude the discussion:
“How did you nd the automobile with the greatest weight?” (I looked for the point furthest to the left.)
“How did you nd the automobile with the greatest fuel eciency?” (I looked for the point that is highest.)
“The data in this table is from automobiles that run solely on gasoline. Where do you think a hybrid car would appear on the graph?” (A hybrid car would use less gas for the same weight, so it's point would be below the other points with a similar weight.)
“Did the scatter plot match your prediction?”
3.3 Activity: Coat Sales
Card 13 of 26
Teaching notes
3.3 Activity: Coat Sales