Given two points M & N on the coordinate plane, find the slope of MN , and state the slope of the line perpendicular to MN . (there's two questions) 1) M(9,6), N(1,4)

2) M(-2,2), N(4,-4)

Problem 1)          

Problem 2)          

Step-by-step explanation:

Problem 1) M(9,6), N(1,4)

Problem 2) M(-2,2), N(4,-4)

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18