Set 6: Linear Functions (Advanced)

Explanation

Answer: A

The population of a town decreases by 500 people per year. In 2020, it was 10,000. What is the population in 2025?

$7,500$

✓ Correct

$8,500$

$12,500$

$9,500$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Linear decay. 1. Rate: $-500$ . 2. Time: $2025- 2020 = 5$ years. 3. Calculation: $10,000 - 500(5) = 10,000 - 2,500 = 7,500$ . Strategic Tip: Decreases mean subtract. Choice B is incorrect because only 3 years? Choice C is incorrect because added instead of subtracted. Choice D is incorrect because only 1 year.

Key Steps:

•

The correct answer is $7,500$

Why others are wrong:

B: Choice B is incorrect and may result from a calculation error.

C: Choice C is incorrect and may result from a calculation error.

D: Choice D is incorrect and may result from a calculation error.

← Previous Next →

🎯 Keep Practicing!

Master all sections for your best SAT score

📚Reading & Writing→📖Vocabulary→