Question

the graph shows the relationship between daily caffeine consumption and resting heart rate for some adults. effects of caffeine which phrases describe the relationship between heart rate and daily intake of caffeine? select two 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 (caffeine intake) increases, the other (heart rate) tends to increase. The scatter plot shows that as total coffee intake (caffeine) increases, resting heart rate generally increases. So it's a positive correlation, not negative or constant.

Step2: Analyze Heart Rate Trend

From the graph, as caffeine intake (cups) increases, the resting heart rate values are generally going up. So "increasing heart rate" is correct, and "decreasing heart rate" is incorrect.

Answer:

B. increasing heart rate, D. positive correlation