How do i solve y= -5 in lines in the xy plane ? im confused .

see the explanation

Step-by-step explanation:

we know that

The equation of a horizontal line is equal to the y-coordinate of the point that passes through it  

In this problem we have

This is a horizontal line (parallel to the x-axis)

The slope of this line is equal to zero

so

All points that pass through the line will have the same y-coordinate equal to -5

see the attached figure to better understand the problem

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step-by-step explanation: