Formulas (Analytic Study guides, Class notes & Summaries
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Formulas (Analytic Exam Success Roadmap: Comprehensive Study Guides
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division of line segment 
x = (x1r2+x2r1)/r1+r2 
y = (y1r2+y2r1)/r1+r2 
Location of midpoint 
x = (x1 + x2)/2 
y = (y1 + y2)/2 
point slope form 
y-y1=m(x-x1) 
two-point form 
y-y₁=(y₂-y₁)/(x₂-x₁)×(x-x₁) 
slope-intercept form 
y=mx+b 
intercept form 
x/a + y/b = 1 
slope of the line 
m = -A/B 
Angle between two lines 
tanΘ = (m1-m2)/(1+m1*m2), m's are slopes of two lines 
Distance of a point from a line Ax+By+C=0 
d = (Ax1+By1+C)/+-(sqrt(A^2+B^2))
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