Parallel lines have the same slope. So if you have y=x+20 for example, the slope is 1 and any parallel line has slope 1 also. I think your equation is x=y+20 but since the+ and - don't show up i am not sure If it is we can rewrite it as -y=-x+20 or y=x-20 and slope is still 1 so any parallel line has slope 1.
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the x-axis is the horizontal line which means the slope is 0. any line parallel also has a slope of zero
When the slope of a line reaches zero it then will be parallel to the x or y axes depending if its a positive or a negative slope.
its the tangent of the angle the slope makes with the x-axis
The equation is x = -7.
Use: (y2 -y1)/(x2 -x1) to find the slope. Use: y -y1 = m(x -x1) to find the slope intercept equation whereas m is the slope.