Set 4: Linear Functions

Explanation

Answer: A

A line passes through $(3, 5)$ and $(3, 10)$ . What is its slope?

Undefined

✓ Correct

$0$

$5$

$1$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Vertical line check. 1. Check x: Both x-coordinates are 3. 2. Conclusion: Vertical line ( $x=3$ ). 3. Slope: Undefined. Strategic Tip: Division by zero ( $3 -3=0$ ) in the denominator means undefined slope. Choice B is incorrect. Choice C is incorrect. Choice D is incorrect.

Key Steps:

•

The correct answer is Undefined

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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