Lesson 9.19.1 Small Group · Group 2
Group 2 · Set BSecond challenge form · new problems, same idea
Learning target I can recognize when two quantities change together, and identify which one is the independent variable and which is the dependent variable, explain how I can tell, and judge a case I have not seen before.
Remember9.1 Small Group · Group 2
A variable is independent because it is chosen, not because it is time or because it comes first. The same quantity can be independent in one situation and dependent in another. Always ask what is chosen.
Words: independent variable (variable independiente)dependent variable (variable dependiente)depends on (depende de)quantity (cantidad)relationship (relación)
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1Complete each step, then write the final answer.
A baker decides how many loaves of bread to bake. Then she measures the flour she needs. Which quantity is the dependent variable: loaves or flour?
Show your workFinal answer: -
2Complete each step, then write the final answer.
Ben wants to run exactly 5 laps. He records how many minutes it takes. Is the number of laps independent or dependent?
Show your workFinal answer: -
3Circle the letter of the best answer. Show how you know.
A phone battery drains while you watch videos. You choose how many minutes to watch. Which sentence is correct?
- AThe battery left depends on the minutes of video.
- BThe minutes of video depend on the battery left.
- CThe battery and the minutes do not change together.
Show your work -
4Circle the letter of the best answer. Show how you know.
A store owner sets the price of a T-shirt. Then she counts how many T-shirts sell that week. Which is the dependent variable?
- AThe number of T-shirts sold
- BThe price of a T-shirt
- CNeither. They do not change together.
Show your work