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parallel lines have the SAME slope
these equations are in slope-intercept form __ y=mx+b
__ where m is the slope of the line and b is the y-intercept
slope is the ratio of the change in y to the change in x
__ the "rise" divided by the "run"
the y-intercept is the point on the y-axis where the line crosses
the slope of the first graph is 4 __ a line parallel to it would have a slope of 4
the slope of the second graph is 2/7 __ a line parallel to it would have a slope of 2/7