Set 4: Linear Functions

Explanation

Answer: A

Which equation represents the y-axis?

$x = 0$

✓ Correct

$y = 0$

$y = x$

$y = 1$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Definition of axes. 1. Y-axis: All points on this vertical line have an x-coordinate of 0. 2. Equation: $x = 0$ . Strategic Tip: The Y-axis is $x=0$ . The X-axis is $y=0$ . Choice B is incorrect because it is the x-axis. Choice C is incorrect because it is diagonal. Choice D is incorrect because it is a horizontal line.

Key Steps:

•

The correct answer is $x = 0$

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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