QR Challenge: Algebra Linear Equations

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. 1. Find the slope of the line that passes through each pair of points. (-4,-1) and (-2,-5); (14,-8) and (7,-6); (2,1)and (8,9)	-2, -2/7, 4/3
2.
3. 2. Determine the value of r so the line passes through each pair of points with the given slope.(6,8) (r, -2) m=1; (-1,-3)(7,r) m= 3/4	-4,3
4.
5. 3. Write a direct variation equation that relates x to y. Assume that y varies directly as x. If y=4 when x=2, find y when x = 16	y=2x;32
6.
7. 4. Graph each equation. y=-3x+2;y= -x-1	see grid paper
8.
9. 5. Write a linear equation in slope intercept form to model the situation. A Cairn terrier weighs 30 pounds and is on a special diet to lose 2 pounds per month.	y=2x+30
10.
11. 6. Write an equation passes through each point or pair of points.(1,9) m=4; (-2,4)(0,6)	y=4x+5 y=x+6
12.
13. 7. Write the point-slope form of an equation.(2,1) m=4	y-1=4(x-2)
14.
15. 8. Write the equation in standard form. y+2=-3(x-1)	3x+1=1
16.
17. 9. Write the equation in slope intercept form.y-6=3(x-1/3)	y=3x+5
18.
19. 10. Write the slope-intercept form for an equation that passes through the given point and is parallel to the graph of each equation. (4,-6) x +2y = 5	y=-1/2x-4
20.
21. 11. Write the slope intercept forom for an equation of the line that passes through the given point and is perpendicular to the graph of each equation. (6,-6) 3x-y=6	y=-1/3x-4

 

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