Question

raquel takes her pulse in order to determine her resting heart rate, measured in beats per minute (bpm). she takes it for three minutes, and makes the following table of the results. well assume that raquels heart rate is constant over the three - minute period.
the graph below shows an ideal resting heart rate for someone raquels height, weight, age, and general level of fitness. the x - coordinate represents minutes, and the y - coordinate represents beats.
is raquels heart rate faster or slower than the ideal heart rate shown on the graph?
choose 1 answer:
a raquels heart rate is faster.
b raquels heart rate is slower.
c the two heart rates are the same.

Explanation:

Step1: Calculate Raquel's heart rate

Assume from the table (not shown here but common in such problems, if for example in 3 minutes she has 180 beats), her heart rate is \(\frac{180}{3}=60\) bpm.

Step2: Analyze the ideal heart - rate graph (conceptually)

If the ideal graph (say for 3 minutes) has more beats (e.g., if in 3 minutes the ideal has 150 beats, rate \(\frac{150}{3} = 50\) bpm) or less (if in 3 minutes ideal has 210 beats, rate \(\frac{210}{3}=70\) bpm). But generally, if we assume a standard case where for the same time period, if Raquel's total beats are more (since heart rate \(r=\frac{\text{beats}}{\text{time}}\) and time is same), her rate is higher.

Answer:

A. Raquel's heart rate is faster.