Set 11: Linear Functions (Intermediate)
Explanation
Which scenario is best modeled by a linear function?
A car driving at a constant speed
Bacteria doubling every hour
A ball thrown in the air falling down
The area of a square as side length increases
Detailed Explanation
Choice A is correct. Choice A is the correct answer. Constant rate of change. 1. Linear: Requires a constant rate (slope). 2. Car: Constant speed = Constant rate of change of distance. 3. Bacteria: Doubling is exponential. 4. Ball: Gravity causes acceleration (Quadratic). 5. Area: (Quadratic). Strategic Tip: Look for "constant rate" or "per unit" without multipliers. Choice B is incorrect (Exponential). Choice C is incorrect (Quadratic). Choice D is incorrect (Quadratic).
Key Steps:
The correct answer is A car driving at a constant speed
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