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Slope intersept
Y=mx+b
Y=a
Zero slope; parallel to the y-axes
X=b
No Slope; parallel to the x-axis
Point-slope formula
y-y_{1}=m(x-x_{1})
Finding the perpendicular bisector
1) find the slope (y-y/x-x) 2) Find the negative reciprical 3) Find midpoint (X+X/2, Y+Y/2) 4) Plug one point into the point slope formula 4) Write answer in y=mx+b