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Semi-Log Plot Activity: Mystery Graphing Picture

This semi-log plot activity will help your students learn to plot points on a semi-log plot while having fun! Your AP Precalculus students will master this tricky graphing skill by completing the mystery graph picture.

semi-log plot mystery graphing picture ap precalculus activity

AP Precalculus Standard Addressed

This semi-log plot mystery picture activity is designed for AP Precalculus students working on topic 2.15 (Semi-Log Plots).

According to College Board’s Course and Exam Description, students are expected to “Construct the linearization of exponential data.” This is accomplished by graphing the exponential data on semi-log graph paper.

This activity specifically helps students practice graphing various points on semi-logarithmic graph paper.

screenshot of semi-log plot activity for ap precalculus.
pile of file folders with overlay text: "ap precalculus activities"


Teaching AP Precalculus this year? I have compiled all of my AP Precalculus activities in one handy spot for you to browse.

Semi-Log Plot Activity Instructions

Once students have been taught to graph coordinates on a semi-log plot, they should be able to complete this activity with relatively no further instructions.

semi-log plot mystery graphing activity with ruler and pen laying on top.

Students are given a set of 17 ordered pairs which must be graphed on the semi-log plot which is provided. Students graph each point and connect them in order with a straight line.

I suggest having students use a ruler or straight edge to make straight, crisp lines between each pair of points.

two points drawn and connected on semi-log plot activity for ap precalculus.

I also highly suggest having students mark off each ordered pair as they graph it to keep track of where they are in the mystery picture process.

partially completed semi-log plot graphing activity for ap precalculus.

Once students graph all of the points and connect them in order, a mystery picture will be revealed.

semi-log plot graphing activity for ap precalculus with mystery picture partially covered by ruler.

To give students further practice with understanding semi-log plots, students are challenged to add a face to their mystery creation. Once adding a face, they must list the coordinates of the points they connected to form the face.

Puzzle Solutions

I intentionally do not make answers to the printable math puzzles I share on my blog available online because I strive to provide learning experiences for my students that are non-google-able. I would like other teachers to be able to use these puzzles in their classrooms as well without the solutions being easily found on the Internet.

However, I do recognize that us teachers are busy people and sometimes need to quickly reference an answer key to see if a student has solved a puzzle correctly or to see if they have interpreted the instructions properly.

If you are a teacher who is using these puzzles in your classroom, please send me an email at sarah@mathequalslove.net with information about what you teach and where you teach. I will be happy to forward an answer key to you.

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