Set 17: Exponential Functions (Advanced)

Explanation

Answer: A

Which equation represents a value that starts at 5 and triples every minute?

$y = 5(3)^t$

✓ Correct

$y = 3(5)^t$

$y = 5(1/3)^t$

$y = 5 + 3t$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Tripling means $b=3$ . 1. Initial: $a=5$ . 2. Factor: $b=3$ . 3. Equation: $y = 5(3)^t$ . Strategic Tip: "Triples" $\to \times 3$ . Choice B is incorrect because it swaps $a$ and $b$ .

Key Steps:

•

The correct answer is $y = 5(3)^t$

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→