Did ya ever wonder
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Did Ya Ever Wonder?. How does a geyser work?. What does Old Faithful look like?. Why are we doing this?. Use your fabulous math skills to determine when Old Faithful will erupt next. Math Journal page 360 R ead the introduction Waiting Time = (10* (length of eruption))+ 30 minutes

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Did Ya Ever Wonder?

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Did Ya Ever Wonder?


How does a geyser work?


What does Old Faithful look like?


Why are we doing this?

  • Use your fabulous math skills to determine when Old Faithful will erupt next.

  • Math Journal page 360

  • Read the introduction

    Waiting Time = (10* (length of eruption))+ 30 minutes

    W = (10*E) + 30

    or W=10E + 30

  • Use this formula with a partner to complete the journal page


Let’s Check Your Work

  • How did you handle the formula when the eruption time (E) was not an exact number of minutes?


More Pan Balance Practice!

  • Math Journal pages 361 + 362

  • Please complete this on your own.


10.6 Rules, Tables, and Graphs 2

  • Math Journal page 364, please.

  • Complete the table naming the x, y coordinates.

  • Can you name the rule that describes the relationship between the coordinates of the ordered number pairs (x, y)?

    x + y = 5 or y = 5 - x


10.6 Rules, Tables, and Graphs 2

  • Plot the ordered pairs.

  • Draw a line that connects the ordered pairs.

  • Do all points on this line satisfy the rule x + y = 5?

  • Check the fractional pairs like (½, 4 ½)

  • Check the negative numbers like (8, -3)


10.6 Rules, Tables, and Graphs 2

  • Complete problem 2 on page 364 with a partner

  • You will complete the table and answer the questions.


10.6 Rules, Tables, and Graphs 2

When you are finished answer these questions:

  • Who is ahead after 8 seconds and by how much?

  • What if the race had been 50 yards instead of 60?

    Use the table to develop rules for Eli and Sarah in terms of time it takes to cover the distance.


Now graph it!

  • Now graph the data from the table using the grid on page 365.

  • Plot one set of data at a time (Eli or Sarah)

  • Draw in the line to connect the ordered pairs for the first set

  • Repeat the process for the second set of data.


Compare the data

  • How are these two lines different?

  • Why are these two lines different?

  • At what time do both Sarah and Eli cross the 50 yard line? How do the lines represent this?

  • Who was ahead after 4 seconds? By how much?

  • How far has Eli run in 5 seconds?

  • What if the race had been 70 yards? Who would have won and by how much?

    Complete problems 4 & 5 on page 365


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