3 5 Equations of Lines by HC11121009519

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									3.5 Equations of Lines

Various forms of equations can be used to represent lines. We select the
best form based on given & required information.

Ax+By=C is the standard or general form of a line equation where A, B,
& C are real numbers and A & B are not both 0.

The point-slope form of the equation of a line is   y  y1  m( x  x1 )
where m is the slope and ( x1 , y1 ) is a point on the line.
y=mx+b is the slope-intercept form of a line where m is the slope and b is
the y-intercept.
x=c where ‘c’ is a real number is a vertical line.

y=b where ‘b’ is a real number is a horizontal line.

Practice problems: p. 189-190 1, 5, 9,…29,41,45,…77

								
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