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I will assume you mean the line passes through (0, -24).

The equation of a line is y=mx+c

Since the line is horizontal, we know m is 0. Since m is zero, the x term disappears, leaving us with:

y = c

Since we know c (the y-intercept) to be -24, the equation of this line is simply:

y = -24

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Q: How do you determine the equation of a horizontal line that passes through negative 2 4?
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