Set 11: Linear Functions (Advanced)

Explanation

Answer: A

Interpret the slope: $H = -5t + 100$ , where $H$ is heat (Joules) and $t$ is time (sec).

Heat is lost at 5 Joules per second

✓ Correct

Heat is gained at 5 Joules per second

Initial heat is 100 Joules

Heat is lost at 100 Joules per second

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Negative slope. 1. Slope: $-5$ . 2. Meaning: Rate of change is negative (Loss). 3. Units: Joules per second (Watts). Strategic Tip: Negative rate = Loss/Decrease. Choice B is incorrect. Choice C is incorrect because intercept. Choice D is incorrect because wrong value.

Key Steps:

•

The correct answer is Heat is lost at 5 Joules per second

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.

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