SAT question b31c3117 (Linear Inequalities)

Question

H = 120 p + 60 The Karvonen formula above shows the relationship between Alice's target heart rate H , in beats per minute (bpm), and the intensity level p of different activities. When p = 0 , Alice has a resting heart rate. When p = 1 , Alice has her maximum heart rate. It is recommended that p be between 0.5 and 0.85 for Alice when she trains. Which of the following inequalities describes Alice's target training heart rate?

College Board · Accepted Answer

The correct answer is A. Choice A is correct. When Alice trains, it's recommended that p be between 0.5 and 0.85 . Therefore, her target training heart rate is represented by the values of H corresponding to 0.5 ≤ p ≤ 0.85 . When p = 0.5 , H = 120 × 0.5 + 60 , or H = 120 . When p = 0.85 , H = 120 × 0.85 + 60 , or H = 162 . Therefore, the inequality that describes Alice's target training heart rate is 120 ≤ H ≤ 162 .

Explanation

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Why the other choices are wrong

SAT Question b31c3117: Linear Inequalities answer and explanation with Desmos solution

Explanation

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Why the other choices are wrong