Download 9/26 Parallel and Perpendicular Lines Review: Parallel Lines

September 26, 2016
9/26
Parallel and Perpendicular Lines
Review:
Parallel Lines
Perpendicular Lines
m1 = m2
m1 = -1
m2
opposite
reciprocal
Example 1: Write the equation of a line that is
parallel to y = -2x + 5, and goes through the
point (9, -8)
Step 1: Calculate slope.
m = -2
Step 2: Use the given point and slope from
Step 1 to plug into point slope form.
y - y1 = m(x - x1)
Step 3: Solve for y and write the equation in
slope-intercept form.
September 26, 2016
Example 2: Write the equation of a line that
is perpendicular to 2x - 5y = 10, and goes
through the point (5, 6)
September 26, 2016