Set 4: Linear Functions

Explanation

Answer: A

Which line is parallel to the x-axis?

$y = 7$

✓ Correct

$x = 7$

$y = x$

$y = 7x$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. The x-axis is horizontal. 1. Parallel: A line parallel to the x-axis must also be horizontal. 2. Form: Horizontal lines have the equation $y = k$ . 3. Match: $y = 7$ fits. Strategic Tip: The x-axis itself is the line $y=0$ . Choice B is incorrect because it is vertical (parallel to y-axis). Choice C is incorrect because it is diagonal. Choice D is incorrect because it is diagonal.

Key Steps:

•

The correct answer is $y = 7$

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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