Set 17: Linear Functions

Explanation

Answer: A

Find the slope of the line $x = 4$ .

Undefined

✓ Correct

$0$

$4$

$1$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Vertical line. 1. Form: $x = k$ is vertical. 2. Slope: Undefined. Strategic Tip: You cannot walk up a vertical wall (undefined slope). Choice B is incorrect because it is horizontal. 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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