No, they are not.
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A line with a y-intercept but no x-intercept will be a straight line parallel to the x axis. It will have a slope of zero.
Slope is zero y-intercept is -7 there is no x-intercept for this equation
The slope is -1.25
It will have the same slope but with a different y intercept
y=mx+b in slope intercept form m=slope b=y-intercept