10
algebra

A streaming platform limits video quality based on internet speed. For HD quality, speed must be at least 5 Mbps. For 4K quality, speed must be at least 25 Mbps. If someone's speed ss qualifies for 4K, which statement is necessarily true?

A

s<25s < 25

B

s≥25s \geq 25

C

5≤s<255 \leq s < 25

D

s=25s = 25

Correct Answer: B

Choice B is the correct answer. Qualifying for a higher tier automatically means meeting that tier's minimum.

  1. 4K requirement: Speed must be at least 25 Mbps
  2. Translation: "At least 25" means s≥25s \geq 25
  3. Logic: If someone qualifies for 4K, their speed MUST be ≥25\geq 25

?�� Strategic Tip: Meeting a "higher" requirement automatically satisfies all "lower" requirements as well.

Choice A is incorrect becauses<25s < 25 would NOT qualify for 4K (contradicts the premise). Choice C is incorrect because this range represents speeds that qualify for HD but NOT 4K. Choice D is incorrect becauses=25s = 25 is the minimum, but 4K could have any speed ≥25\geq 25 (like 30, 50, 100 Mbps).

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Linear Functions Set 65