A Cardiac Monitor Is Used to Measure the Heart Rate $t$

question 33

Multiple Choice

A cardiac monitor is used to measure the heart rate of a patient after surgery. It compiles the number of heartbeats after $t$ minutes. When the data in the table are graphed, the slope of the tangent line represents the heart rate in beats per minute. The monitor estimates this value by calculating the slope of a secant line. Use the data to estimate the patient's heart rate after 42 minutes using the secant line between the points with $t = 38$ and $t = 42$ .
$\begin{array}{|c|c|c|c|c|c|}\hline t \text { (mins) } & 36 & 38 & 40 & 42 & 44 \\\hline \text { Heartbeats } & 2570 & 2720 & 2840 & 3020 & 3070 \\\hline\end{array}$

Select the correct answer.

• A) 74
• B) 80
• C) 85
• D) 70
• E) 76
• F) 75

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Definitions:

Equilibrium Price

The price at which the quantity of a good or service demanded equals the quantity supplied, achieving market equilibrium.

Inverse Supply

Displaying how supply levels adjust based on varying price points; this model inversely associates the supply quantity with its price.

Inverse Demand

A rephrased definition: It refers to the relationship that shows the price of a good as a function of the quantity demanded, essentially the inverse function of a demand curve.

Tax

A required economic dues or other form of assessment exacted from a taxpayer by government authorities meant to finance government activities and assorted public costs.