parallel lines m1=m2 and perpendicular m1*mw=1

complete the table of ordered paris for linear equation 3x+y=10

3x + y =10

y = 10 - 3x

x   0        1       2        3        4      5       6

y   10      7       4        1       -2     -5      -8

Ordered pairs: (0,10), (1,7),(2,4), (3,1), (4,-2), (5,-5),(6,-8)

y = mx +b 

y = -3x +10   so m =-3

m1 = m2 = -3

m1 * mw =1

3mw = 1

mw = 1/3