Which point is the image of (2, -7) after reflecting across the y-axis?

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Master the Certify Teacher EC-6 (391) Mathematics Test. Use flashcards and multiple choice questions with explanations. Boost your confidence and excel in your exam!

Multiple Choice

Which point is the image of (2, -7) after reflecting across the y-axis?

Explanation:
Reflecting across the y-axis changes the sign of the x-coordinate while leaving the y-coordinate the same. So the image of (2, -7) becomes (-2, -7). The y value stays -7, and the x value flips from 2 to -2. The other coordinates would imply changing the y value or leaving x unchanged, which isn’t what happens with a reflection across the y-axis.

Reflecting across the y-axis changes the sign of the x-coordinate while leaving the y-coordinate the same. So the image of (2, -7) becomes (-2, -7). The y value stays -7, and the x value flips from 2 to -2. The other coordinates would imply changing the y value or leaving x unchanged, which isn’t what happens with a reflection across the y-axis.

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