Grades 11-12 Video Solutions 2026-2026_11-12

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Question 2. During a 30 minute jog, Mia's smartwatch gives this report. For the first 10 minutes, her heart rate increased by 4 beats per minute every minute. For the next 10 minutes, her heart rate stayed constant. For the last 10 minutes, her heart rate decreased by 2 beats per minute every minute. Which of the following shows the graph of her heart rate? Each graph of heart rate has beats per minute on the y-axis and time on the x-axis. This means the slope of each line is the beats per minute per minute. We are told that in the first 10 minutes, Mia's heart rate increases by 4 beats per minute per minute, while in the last 10 minutes, Mia's heart rate decreases by 2 beats per minute per minute. Therefore, the answer should have the first 10 minutes of the graph be twice as steep as the last 10 minutes, with the first 10 minutes having an increase in BPM and the last 10 minutes having a decrease in BPM. Out of all these answers, only answer choice B has this property.

Keywords

heart rate

slope

graph

beats per minute

line graph