Question

the graph shows the relationship between daily caffeine consumption and resting heart rate for some adults. which phrases describe the relationship between heart rate and daily intake of caffeine? select two options. effects of caffeine graph with x-axis total coffee intake (cups) and y-axis resting heart rate (bpm) options: negative correlation, increasing heart rate, constant correlation, positive correlation, decreasing heart rate

Explanation:

Step1: Analyze Correlation Type

A positive correlation means as one variable (daily caffeine intake) increases, the other (resting heart rate) also tends to increase. From the scatter plot, as total coffee intake (caffeine) increases, resting heart rate generally increases. So it's a positive correlation.

Step2: Analyze Heart Rate Trend

Looking at the plot, as caffeine intake (cups) increases, the resting heart rate values show an upward trend (increasing). So "increasing heart rate" is correct, and "positive correlation" is also correct. The other options: negative correlation is opposite, constant correlation doesn't fit (values aren't constant), decreasing heart rate is opposite.

Answer:

B. increasing heart rate, D. positive correlation