QR Challenge: Linear Equation/Inequality Review

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• Bring these devices into the lesson.

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

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B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

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C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

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Questions / Answers (teacher reference)

Question	Answer
1. Graph the equation of a line that is parallel to y = 3x – 4 and passes through (2, 1). Your next clue will be waiting at another point that crosses through this line.	(-1,-8)
2. Graph the inequality x + 4y ≥ 2. Select a point in the solution set that has a positive x and positive y coordinate and verify that your solution works. Your next clue will be waiting at this point.	(13, 11)
3. Determine whether the graphs of the lines x = 12 and 2x + 3y = 21 are perpendicular. Explain. Use the intersection of these two lines to find your next problem.	(12,-1)
4. 4Write an equation in slope-intercept form for the line that passes through (4, 5) and has a slope of -1/4. Your next clue will be waiting at some point on this line.	(-20, 11)
5. Write an equation of a line whose slope is 0 and y-intercept is 9. Your next clue will be waiting at some point on this line.	(-4, 9)
6. Graph the inequality 4x – 77 > 27. Use the graph to find a point in the solution set whose x-coordinate is positive, and the y-coordinate is negative.	(27, -12)
7. Write an equation for the line that passes through (-11, -4) and (4, 11). What is the slope? Where does the line intersect the x-axis? The y-axis? Graph the line to find your next problem.	(-19,-12)
8. Find the value of r so the line through (11, r) and (-7, 1) has a slope of 1/6. Graph the line to find the location of the next problem.	(23,6)

 

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