Eli's mile time drops a little every week. A graph can tell you where it's heading, and it can also tell you where it can't go.
Not started yet.
By the end of this lesson your student should be able to describe a trend, find the change per step, extend the trend to make a prediction, and explain when a prediction can't be trusted.
🚨 Dividing by the number of data points instead of the number of steps between them. Five weeks of data only has four steps.
Forgetting the sign. A time that is falling has a negative change, and adding it moves the prediction down.
Trusting a prediction a long way out. A trend is only a guide, and a runner can't reach a mile time of zero.
Have the student say the prediction as a sentence with the word about in it. A prediction is a good guess from a pattern, so it should never sound like a fact.
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Before You Start
The words this lesson uses. Tap a card to see what it means, then come back to them whenever a question uses one.
Part One
Questions about the story you just read. Pick your answer straight off, or press Find it in the story if you would rather hunt for the sentence first.
Part Two
The word cards are at the top of this page. Look back at them as often as you need, then answer.