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| GRAPHS |
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Note: When y1 = y2, the line
l will always be a horizontal line and the slope (m) of l will always
equal to 0 since y1 – y2 = 0 and 0 divided by any non-zero number
is 0.
Thus, when the slope (m) is zero, you will always have a horizontal
line and the line will always contain the y-coordinates of the points as
shown.
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