9m because if you multiply 3 times 3 it will give you 9.
Hope this helps :)
Answer:
The required equation is 6x+5y+57=0.
y=3x+6
Step-by-step explanation:
point 1 (2;12)
point 2 (4;18)
m=3
y=mx+b
sub in a point and gradient
12=3(2)+b
12=6+b
b=6