Set 15: Linear Functions (Intermediate)

Explanation

Answer: A

Which equation is equivalent to $y = -2x + 5$ ?

$2x + y = 5$

✓ Correct

$2x - y = 5$

$x + 2y = 5$

$2x + y = -5$

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Rearrange. 1. Add 2 x: $2x + y = 5$ . Strategic Tip: Moving a term across the equals sign changes its sign. Choice B is incorrect because sign error on y. Choice C is incorrect because coefficients swapped. Choice D is incorrect because sign error on constant.

Key Steps:

•

The correct answer is $2x + y = 5$

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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