10

Set 1: Linear Functions

Explanation

Answer: A

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

A.

Heat is lost at 5 Joules per second

✓ Correct
B.

Heat is gained at 5 Joules per second

C.

Initial heat is 100 Joules

D.

Heat is lost at 100 Joules per second

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Negative slope. 1. Slope: −5-5. 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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