2.5 Parallel and Perpendicular Lines

3x+4y =−8

7x+ y =−2

x− y =4

6x−5y =20

Find the slope of a line parallel to each given line.
y = 2x + 4

through: (4,−3), perpendicular to −x+2y =−6

y =4x−5

Write the point-slope form of the equation of the line described.
through: (5, 2), perpendicular to 5x+ y =−3

x=3

y=−(10/3)x−5