Step-by-step explanation:
1a R is parallel because it has the same slope.
1b S is perpendicular
2a m = 3
y -5 = 3(x-4) y= 3x -7
2b y = 4 - 1/3x
3. m = -1/3
y -7 = -1/3(x -3) y = -1/3x +8
