Rewriting the equation 3x + y = 15 gives y = 15 - 3x
The slope of this and any parallel line is the x multiple, which in this case is -3
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The line y = 6 is horizontal and has a slope of zero, as does any line that is parallel to it.
-14
The slope of both lines will be the same.
5
The line 'Y = - 3' has a slope of zero. Any line parallel to it also has a slope of zero. The line parallel to it with a Y-intercept of 7 is: Y = 7