Perpendicular has slope tha multiplies to -1
y=mx+b
m=slope
y=1/3x+b
1/3=slope
1/3 times what=-1?
-3 is answer
y=-3x+b
find b
given
(2,1)
(x,y)
x=2 and y=1 is a solution
1=-3(2)+b
1=-6+b
add 6
7=b
y=-3x+7
B is answer
Answer: x=
1
/4
y+
9
/4
Step-by-step explanation:
2/3 = 9/y
cross multiply
2y = 9 * 3
2y = 27
y = 27/2
y = 13.5 or 13 1/2