Set 8: Linear Functions

Explanation

Answer: A

Which equation represents a vertical line passing through $(-2, 7)$ ?

$x = -2$

✓ Correct

$y = 7$

$y = -2$

$x = 7$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Vertical line. 1. Form: $x = k$ . 2. Value: x-coordinate is -2. 3. Equation: $x = -2$ . Strategic Tip: Vertical lines ignore the y-coordinate. Choice B is incorrect because horizontal. Choice C is incorrect because horizontal. Choice D is incorrect because wrong coordinate.

Key Steps:

•

The correct answer is $x = -2$

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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