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# algebra formulas

Distance formula D= the square root of (x2-x1)2 + (y2-y1)2
Midpoint formula M= (x1+x2/2, y1+y2/2)
Vertical lines have______slopes and equations of the form_____. undefined, x=#
Horizontal lines have______slopes and equations of the form____. 0, y=#
Slope intercept form y=mx+b (m=slope) (b=y intercept)
Point-slope form y-y1=M(x-x1) (m=slope; x1,y1=point on line)
Intercept-intercept form x/x-intercept + y/y-intercept=1
Standard form Ax+By=C (A,B, and C are integers and A>0)
Parallel lines have __________ slopes. The same.
Perpendicular lines have ________ slopes. Negative reciprocal.
Standard form of a circle (x-h)2+(y-k)2=r2
Axis of symmetry equation x= -b/2a
Slope formula m= y2-y1/x2-x1
Created by: ashleighwren