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On the graph below, which dotted line represents a reflection across the x-axis of the red-solid-line graph?5 stars for quicknessplease look at png 1 is question 2 is answer

On the graph below, which dotted line represents a reflection across the x-axis of-example-1
On the graph below, which dotted line represents a reflection across the x-axis of-example-1
On the graph below, which dotted line represents a reflection across the x-axis of-example-2
User RodgerB
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1 Answer

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Hello!

The rule for a reflection across the x-axis is:


(x,y)=(x,-y)

Knowing it, let's write some points that the red line passes through:

(-2, 0) and (0, 4).

Now, let's use this rule and change the sign of the y coordinate:

• (-2, 0) → (-2, 0) because +0 or -0 doesn't exist.

,

• (0, 4) → (0, -4)

Let's analyze it and find a line that passes through these two points:

(-2, 0) and (0, -4)

It will be the blue line.

User Martin Volek
by
7.6k points
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