#24
slope = -3
pass order pairs (1,2)
y = mx + b
2 = -3(1) + b
b = 5
so equation
y = -3x +5
answer y = -3x +5 (first choice)
#25
perpendicular slope = -2
pass point (4,1)
y = mx + b
1 = -2(4) + b
b = 9
equation
y = -2x + 9
answer
y = -2x + 9 (first choice)